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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_InventoryNet" xml:lang="en-US">Inventory</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_InventoryNet" xml:lang="en-US">Inventory</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_F4248H746F72_us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xml:lang="en-US">Prepaid expenses and other receivables</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xml:lang="en-US">Prepaid expenses and other receivables</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:to="lab_H6460J968H94_us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_AssetsCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AssetsCurrent" xml:lang="en-US">Total Current Assets</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AssetsCurrent" xml:lang="en-US">Total Current Assets</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_AssetsCurrent" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_AssetsCurrent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_F4248H746F72_us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_IntangibleAssetsNetExcludingGoodwill" xml:lang="en-US">Patents</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_IntangibleAssetsNetExcludingGoodwill" xml:lang="en-US">Patent rights</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:to="lab_H6460J968H94_us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepositsAssetsNoncurrent" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DepositsAssetsNoncurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DepositsAssetsNoncurrent" xml:lang="en-US">Deposit for equipment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DepositsAssetsNoncurrent" xml:lang="en-US">Deposit for equipment</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DepositsAssetsNoncurrent" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DepositsAssetsNoncurrent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_F4248H746F72_us-gaap_PropertyPlantAndEquipmentNet"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_PropertyPlantAndEquipmentNet" xml:lang="en-US">Property and equipment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_PropertyPlantAndEquipmentNet" xml:lang="en-US">Property and equipment</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_PropertyPlantAndEquipmentNet" xlink:to="lab_H6460J968H94_us-gaap_PropertyPlantAndEquipmentNet"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_Assets"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_Assets" xml:lang="en-US">Assets</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_Assets" xml:lang="en-US">Assets</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_Assets" xml:lang="en-US">TOTAL ASSETS</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_Assets" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_Assets"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAbstract" xlink:label="loc_F4248H746F72_us-gaap_LiabilitiesAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_LiabilitiesAbstract" xml:lang="en-US">LIABILITIES</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_LiabilitiesAbstract" xml:lang="en-US">LIABILITIES</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_LiabilitiesAbstract" xlink:to="lab_H6460J968H94_us-gaap_LiabilitiesAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_LiabilitiesCurrentAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_LiabilitiesCurrentAbstract" xml:lang="en-US">CURRENT LIABILITIES</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_LiabilitiesCurrentAbstract" xml:lang="en-US">CURRENT LIABILITIES</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_LiabilitiesCurrentAbstract" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_LiabilitiesCurrentAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="loc_F4248H746F72_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xml:lang="en-US">Accounts payable and accrued liabilities</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xml:lang="en-US">Accounts payable and accrued liabilities</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:to="lab_H6460J968H94_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredRevenue" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DeferredRevenue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DeferredRevenue" xml:lang="en-US">Deferred Revenue</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DeferredRevenue" xml:lang="en-US">Deferred revenue</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DeferredRevenue" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DeferredRevenue"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecuredDebtCurrent" xlink:label="loc_F4248H746F72_us-gaap_SecuredDebtCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_SecuredDebtCurrent" xml:lang="en-US">Secured convertible debentures</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_SecuredDebtCurrent" xml:lang="en-US">Secured convertible debentures</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_SecuredDebtCurrent" xlink:to="lab_H6460J968H94_us-gaap_SecuredDebtCurrent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DerivativeLiabilitiesCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DerivativeLiabilitiesCurrent" xml:lang="en-US">Derivative liabilities</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DerivativeLiabilitiesCurrent" xml:lang="en-US">Derivative liabilities</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DerivativeLiabilitiesCurrent" xml:lang="en-US">Derivative financial instruments</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DerivativeLiabilitiesCurrent" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DerivativeLiabilitiesCurrent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_F4248H746F72_us-gaap_LiabilitiesCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_LiabilitiesCurrent" xml:lang="en-US">Total Current Liabilities</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_H6460J968H94_us-gaap_LiabilitiesCurrent" xml:lang="en-US">Total Current Liabilities</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_LiabilitiesCurrent" xlink:to="lab_H6460J968H94_us-gaap_LiabilitiesCurrent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConvertibleDebtNoncurrent" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ConvertibleDebtNoncurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebtNoncurrent" xml:lang="en-US">Long term secured convertible debentures</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebtNoncurrent" xml:lang="en-US">Secured convertible debentures, net of deferred financing costs</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebtNoncurrent" xml:lang="en-US">Long term convertible notes</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ConvertibleDebtNoncurrent" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebtNoncurrent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_F4248H746F72_us-gaap_Liabilities"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_Liabilities" xml:lang="en-US">Total Liabilities</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_Liabilities" xml:lang="en-US">Total Liabilities</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_H6460J968H94_us-gaap_Liabilities" xml:lang="en-US">Total Liabilities</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_Liabilities" xlink:to="lab_H6460J968H94_us-gaap_Liabilities"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_StockholdersEquityAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_StockholdersEquityAbstract" xml:lang="en-US">STOCKHOLDERS' (DEFICIENCY) EQUITY</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_StockholdersEquityAbstract" xml:lang="en-US">STOCKHOLDERS' (DEFICIENCY) EQUITY</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_StockholdersEquityAbstract" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_StockholdersEquityAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalAbstract" xlink:label="loc_F4248H746F72_us-gaap_CapitalAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_CapitalAbstract" xml:lang="en-US">Capital stock</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_CapitalAbstract" xml:lang="en-US">Capital stock</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_CapitalAbstract" xlink:to="lab_H6460J968H94_us-gaap_CapitalAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_PreferredStockValue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PreferredStockValue" xml:lang="en-US">Preferred stock</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PreferredStockValue" xml:lang="en-US">Preferred stock, $0.001 par value, 5,000,000 shares authorized, Nil issued and outstanding (November 30, 2018 - nil).</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_F4248H746F72_us-gaap_CommonStockValue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_CommonStockValue" xml:lang="en-US">Common stock</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_CommonStockValue" xml:lang="en-US">Common stock, $0.001 par value 200,000,000 shares authorized, 103,093,442 issued and outstanding (November 30, 2018: 101,976,900)</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_AdditionalPaidInCapital"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AdditionalPaidInCapital" xml:lang="en-US">Additional paid-in capital</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AdditionalPaidInCapital" xml:lang="en-US">Additional paid-in capital</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_AdditionalPaidInCapital" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_AdditionalPaidInCapital"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_F4248H746F72_us-gaap_RetainedEarningsAccumulatedDeficit"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_RetainedEarningsAccumulatedDeficit" xml:lang="en-US">Deficiency</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_RetainedEarningsAccumulatedDeficit" xml:lang="en-US">Accumulated deficit</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_RetainedEarningsAccumulatedDeficit" xml:lang="en-US">Accumulated deficit</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_H6460J968H94_us-gaap_RetainedEarningsAccumulatedDeficit" xml:lang="en-US">Deficiency</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PreferredStockSharesAuthorized" xml:lang="en-US">Preferred Stock, Shares Authorized</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_F4248H746F72_us-gaap_PreferredStockSharesIssued"/>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_PreferredStockSharesOutstanding"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PreferredStockSharesOutstanding" xml:lang="en-US">Preferred Stock, Shares Outstanding</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_CommonStockParOrStatedValuePerShare" xml:lang="en-US">Common Stock, Par Value Per Share</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_CommonStockParOrStatedValuePerShare" xml:lang="en-US">Common Stock, Par or Stated Value Per Share</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_CommonStockSharesAuthorized"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_CommonStockSharesAuthorized" xml:lang="en-US">Common Stock, Shares Authorized</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_CommonStockSharesAuthorized" xml:lang="en-US">Common Stock, Shares Authorized</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_F4248H746F72_us-gaap_CommonStockSharesIssued"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_CommonStockSharesIssued" xml:lang="en-US">Common Stock, Shares, Issued</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_CommonStockSharesIssued" xml:lang="en-US">Common Stock, Shares, Issued</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_CommonStockSharesOutstanding"/>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_IncomeStatementAbstract" xml:lang="en-US">Statement of Operations [Abstract]</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_Revenues" xml:lang="en-US">Sales</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_Revenues" xml:lang="en-US">SALES</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_CostOfRevenue" xml:lang="en-US">COST OF SALES</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_GrossProfit" xml:lang="en-US">GROSS PROFIT</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_GeneralAndAdministrativeExpense" xml:lang="en-US">Selling, general and administration</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_GeneralAndAdministrativeExpense" xml:lang="en-US">Selling, general and administration</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_OperatingExpenses" xml:lang="en-US">TOTAL OPERATING EXPENSES</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_OperatingExpenses" xml:lang="en-US">TOTAL OPERATING EXPENSES</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_F4248H746F72_us-gaap_OperatingIncomeLoss"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_OperatingIncomeLoss" xml:lang="en-US">LOSS FROM OPERATIONS</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_OperatingIncomeLoss" xml:lang="en-US">Loss from Operations</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_H6460J968H94_us-gaap_OperatingIncomeLoss" xml:lang="en-US">LOSS FROM OPERATIONS</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccretionExpense" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_AccretionExpense"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AccretionExpense" xml:lang="en-US">Accretion</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AccretionExpense" xml:lang="en-US">Accretion</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AccretionExpense" xml:lang="en-US">Accretion</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AccretionExpense" xml:lang="en-US">Accretion</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_AccretionExpense" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_AccretionExpense"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="loc_F4248H746F72_us-gaap_DerivativeGainLossOnDerivativeNet"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DerivativeGainLossOnDerivativeNet" xml:lang="en-US">Change in fair value of derivative liability</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_DerivativeGainLossOnDerivativeNet" xml:lang="en-US">Change in fair value of derivative liabilities</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_H6460J968H94_us-gaap_DerivativeGainLossOnDerivativeNet" xml:lang="en-US">Change in fair value of derivative liabilities</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_DerivativeGainLossOnDerivativeNet" xlink:to="lab_H6460J968H94_us-gaap_DerivativeGainLossOnDerivativeNet"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingExpense" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_OtherNonoperatingExpense"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_OtherNonoperatingExpense" xml:lang="en-US">Other expense-Interest</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_OtherNonoperatingExpense" xml:lang="en-US">Other expense-Interest</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_OtherNonoperatingExpense" xml:lang="en-US">Other expense-interest</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_OtherNonoperatingExpense" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_OtherNonoperatingExpense"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_F4248H746F72_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xml:lang="en-US">LOSS BEFORE INCOME TAXES</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xml:lang="en-US">Loss before Income Taxes</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_H6460J968H94_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xml:lang="en-US">LOSS BEFORE INCOME TAXES</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="lab_H6460J968H94_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_IncomeTaxExpenseBenefit"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_IncomeTaxExpenseBenefit" xml:lang="en-US">Income taxes</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_IncomeTaxExpenseBenefit" xml:lang="en-US">Income taxes</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_IncomeTaxExpenseBenefit" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_IncomeTaxExpenseBenefit"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_F4248H746F72_us-gaap_NetIncomeLoss"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_NetIncomeLoss" xml:lang="en-US">NET LOSS</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_NetIncomeLoss" xml:lang="en-US">Net loss for the period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_NetIncomeLoss" xml:lang="en-US">Net loss for the period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_H6460J968H94_us-gaap_NetIncomeLoss" xml:lang="en-US">NET LOSS</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_NetIncomeLoss" xlink:to="lab_H6460J968H94_us-gaap_NetIncomeLoss"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xml:lang="en-US">Foreign exchange translation adjustment for the year</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xml:lang="en-US">Foreign exchange translation adjustment for the year</label>
<label xlink:type="resource" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">Foreign exchange translation adjustment for the period</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_F4248H746F72_us-gaap_ComprehensiveIncomeNetOfTax"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ComprehensiveIncomeNetOfTax" xml:lang="en-US">COMPREHENSIVE LOSS</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_ComprehensiveIncomeNetOfTax" xml:lang="en-US">Comprehensive Loss</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_H6460J968H94_us-gaap_ComprehensiveIncomeNetOfTax" xml:lang="en-US">COMPREHENSIVE LOSS</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="lab_H6460J968H94_us-gaap_ComprehensiveIncomeNetOfTax"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareBasicAndDiluted" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_EarningsPerShareBasicAndDiluted"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_EarningsPerShareBasicAndDiluted" xml:lang="en-US">Loss per share - basic and diluted</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_EarningsPerShareBasicAndDiluted" xml:lang="en-US">Loss per share - basic and diluted</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_EarningsPerShareBasicAndDiluted" xml:lang="en-US">Loss per share - basic and diluted (in dollars per share)</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_EarningsPerShareBasicAndDiluted" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_EarningsPerShareBasicAndDiluted"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_F4248H746F72_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xml:lang="en-US">Weighted average number of common shares outstanding</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xml:lang="en-US">Weighted average common shares outstanding during the period (in shares)</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="lab_H6460J968H94_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_StatementOfCashFlowsAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_StatementOfCashFlowsAbstract" xml:lang="en-US">Statement of Cash Flows [Abstract]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_StatementOfCashFlowsAbstract" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_StatementOfCashFlowsAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_F4248H746F72_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xml:lang="en-US">CASH FLOWS FROM OPERATING ACTIVITIES</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="lab_H6460J968H94_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xml:lang="en-US">Items not involving cash:</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_FairValueOfOptionsAndWarrants" xlink:label="loc_F4248H746F72_sdev_FairValueOfOptionsAndWarrants"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_FairValueOfOptionsAndWarrants" xml:lang="en-US">Fair Value Of Options And Warrants</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_sdev_FairValueOfOptionsAndWarrants" xml:lang="en-US">Stock-based compensation expense (included in selling, general and administration expenses)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_FairValueOfOptionsAndWarrants" xml:lang="en-US">Value of issue of options (included in general and administration expenses)</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_FairValueOfOptionsAndWarrants" xlink:to="lab_H6460J968H94_sdev_FairValueOfOptionsAndWarrants"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealized" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ForeignCurrencyTransactionGainLossUnrealized"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ForeignCurrencyTransactionGainLossUnrealized" xml:lang="en-US">Foreign currency translation gain</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ForeignCurrencyTransactionGainLossUnrealized" xml:lang="en-US">Foreign currency translation (gain) loss</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ForeignCurrencyTransactionGainLossUnrealized" xml:lang="en-US">Foreign currency translation loss</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ForeignCurrencyTransactionGainLossUnrealized" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ForeignCurrencyTransactionGainLossUnrealized"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims" xlink:label="loc_F4248H746F72_us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims" xml:lang="en-US">Issue of common shares for services</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims" xml:lang="en-US">Issue of common shares for services</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims" xlink:to="lab_H6460J968H94_us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xml:lang="en-US">Changes in non-cash working capital:</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xml:lang="en-US">Changes in non-cash working capital:</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_F4248H746F72_us-gaap_IncreaseDecreaseInAccountsReceivable"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_IncreaseDecreaseInAccountsReceivable" xml:lang="en-US">Accounts receivable (IncreaseDecreaseInAccountsReceivable)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_H6460J968H94_us-gaap_IncreaseDecreaseInAccountsReceivable" xml:lang="en-US">Accounts receivable</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xml:lang="en-US">Prepaid expenses and other receivables (IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xml:lang="en-US">Prepaid expenses and other receivables</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="loc_F4248H746F72_us-gaap_IncreaseDecreaseInDeferredRevenue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_IncreaseDecreaseInDeferredRevenue" xml:lang="en-US">Increase (Decrease) in Deferred Revenue</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_IncreaseDecreaseInDeferredRevenue" xml:lang="en-US">Deferred revenue</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:to="lab_H6460J968H94_us-gaap_IncreaseDecreaseInDeferredRevenue"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_IncreaseDecreaseInInventories"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_IncreaseDecreaseInInventories" xml:lang="en-US">Inventory (IncreaseDecreaseInInventories)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_IncreaseDecreaseInInventories" xml:lang="en-US">Inventory</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_IncreaseDecreaseInInventories" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_IncreaseDecreaseInInventories"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_F4248H746F72_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xml:lang="en-US">Accounts payable and accrued liabilities (IncreaseDecreaseInAccountsPayableAndAccruedLiabilities)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xml:lang="en-US">Accounts payable and accrued liabilities</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:to="lab_H6460J968H94_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_NetCashProvidedByUsedInOperatingActivities" xml:lang="en-US">NET CASH USED IN OPERATING ACTIVITIES</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_NetCashProvidedByUsedInOperatingActivities" xml:lang="en-US">Net cash used in operating activities</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_NetCashProvidedByUsedInOperatingActivities" xml:lang="en-US">NET CASH USED IN OPERATING ACTIVITIES</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_F4248H746F72_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xml:lang="en-US">CASH FLOWS FROM INVESTING ACTIVITIES</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xml:lang="en-US">CASH FLOWS FROM INVESTING ACTIVITIES</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="lab_H6460J968H94_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForOtherDeposits" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_PaymentsForOtherDeposits"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PaymentsForOtherDeposits" xml:lang="en-US">Deposit for equipment (PaymentsForOtherDeposits)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PaymentsForOtherDeposits" xml:lang="en-US">Deposit for equipment</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_PaymentsForOtherDeposits" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_PaymentsForOtherDeposits"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_F4248H746F72_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xml:lang="en-US">Purchase of property and equipment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_H6460J968H94_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xml:lang="en-US">Purchase of property and equipment</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="lab_H6460J968H94_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_NetCashProvidedByUsedInInvestingActivities" xml:lang="en-US">NET CASH USED IN INVESTING ACTIVITIES</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_NetCashProvidedByUsedInInvestingActivities" xml:lang="en-US">NET CASH USED IN INVESTING ACTIVITIES</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_F4248H746F72_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xml:lang="en-US">CASH FLOWS FROM FINANCING ACTIVITIES</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xml:lang="en-US">CASH FLOWS FROM FINANCING ACTIVITIES</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="lab_H6460J968H94_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfOtherShortTermDebt" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_RepaymentsOfOtherShortTermDebt"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_RepaymentsOfOtherShortTermDebt" xml:lang="en-US">Repayment of unsecured convertible debentures</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_RepaymentsOfOtherShortTermDebt" xml:lang="en-US">Repayment of unsecured convertible debentures</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_RepaymentsOfOtherShortTermDebt" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_RepaymentsOfOtherShortTermDebt"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_F4248H746F72_us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_NetCashProvidedByUsedInFinancingActivities" xml:lang="en-US">NET CASH PROVIDED (USED) BY FINANCING ACTIVITIES</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_H6460J968H94_us-gaap_NetCashProvidedByUsedInFinancingActivities" xml:lang="en-US">NET CASH USED BY FINANCING ACTIVITIES</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="lab_H6460J968H94_us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xml:lang="en-US">Effects of foreign currency exchange rate changes</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xml:lang="en-US">Effects of foreign currency exchange rate changes</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_F4248H746F72_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xml:lang="en-US">NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS FOR THE PERIOD</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_H6460J968H94_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xml:lang="en-US">NET DECREASE IN CASH AND CASH EQUIVALENTS FOR THE PERIOD</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="lab_H6460J968H94_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_SupplementalCashFlowInformationAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SupplementalCashFlowInformationAbstract" xml:lang="en-US">SUPPLEMENTAL DISCLOSURE OF CASH FLOWS:</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SupplementalCashFlowInformationAbstract" xml:lang="en-US">SUPPLEMENTAL DISCLOSURE OF CASH FLOWS:</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_SupplementalCashFlowInformationAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxesPaid" xlink:label="loc_F4248H746F72_us-gaap_IncomeTaxesPaid"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_IncomeTaxesPaid" xml:lang="en-US">INCOME TAXES PAID</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_IncomeTaxesPaid" xml:lang="en-US">INCOME TAXES PAID</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_IncomeTaxesPaid" xlink:to="lab_H6460J968H94_us-gaap_IncomeTaxesPaid"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_InterestPaidNet"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_InterestPaidNet" xml:lang="en-US">Interest Paid, Excluding Capitalized Interest, Operating Activities</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_InterestPaidNet" xml:lang="en-US">INTEREST PAID</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_InterestPaidNet" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_InterestPaidNet"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="loc_F4248H746F72_us-gaap_StatementOfStockholdersEquityAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_StatementOfStockholdersEquityAbstract" xml:lang="en-US">Statement of Stockholders Equity [Abstract]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="lab_H6460J968H94_us-gaap_StatementOfStockholdersEquityAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_StatementEquityComponentsAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_StatementEquityComponentsAxis" xml:lang="en-US">Statement, Equity Components [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_StatementEquityComponentsAxis" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_StatementEquityComponentsAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_F4248H746F72_us-gaap_CommonStockMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_CommonStockMember" xml:lang="en-US">Common Shares [Member]</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_AdditionalPaidInCapitalMember"/>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_SharesToBeIssuedMember" xml:lang="en-US">Shares To Be Issued [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_sdev_SharesToBeIssuedMember" xml:lang="en-US">Shares To Be Issued [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_SharesToBeIssuedMember" xml:lang="en-US">Subscription for common Stock</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_SharesToBeIssuedMember" xlink:to="lab_H6460J968H94_sdev_SharesToBeIssuedMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_DeficitAccumulatedDuringDevelopmentStageMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_DeficitAccumulatedDuringDevelopmentStageMember"/>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_DeficitAccumulatedDuringDevelopmentStageMember" xml:lang="en-US">Accumulated Deficit [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_DeficitAccumulatedDuringDevelopmentStageMember" xml:lang="en-US">Accumulated Deficit</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_F4248H746F72_us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xml:lang="en-US">Accumulated Other Comprehensive loss [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:to="lab_H6460J968H94_us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_EquityComponentDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_EquityComponentDomain" xml:lang="en-US">Statement, Equity Components [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_EquityComponentDomain" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_EquityComponentDomain"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharesIssued" xlink:label="loc_F4248H746F72_us-gaap_SharesIssued"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_SharesIssued" xml:lang="en-US">Shares Issued (Shares)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_H6460J968H94_us-gaap_SharesIssued" xml:lang="en-US">Beginning Balance (Shares)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_H6460J968H94_us-gaap_SharesIssued" xml:lang="en-US">Ending Balance (Shares)</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_SharesIssued" xlink:to="lab_H6460J968H94_us-gaap_SharesIssued"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ShareBasedCompensation"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensation" xml:lang="en-US">Stock based compensation</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensation" xml:lang="en-US">Stock based compensation</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ShareBasedCompensation" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensation"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_IssuanceOfCommonSharesForServices" xlink:label="loc_F4248H746F72_sdev_IssuanceOfCommonSharesForServices"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_IssuanceOfCommonSharesForServices" xml:lang="en-US">Issuance Of Common Shares For Services</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_IssuanceOfCommonSharesForServices" xml:lang="en-US">Shares issued for services</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_IssuanceOfCommonSharesForServices" xml:lang="en-US">Issuance of common shares For services</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_IssuanceOfCommonSharesForServices" xlink:to="lab_H6460J968H94_sdev_IssuanceOfCommonSharesForServices"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_IssuanceOfCommonSharesForServicesShares" xlink:label="loc_IF21F453I7K897H8F732_sdev_IssuanceOfCommonSharesForServicesShares"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_IssuanceOfCommonSharesForServicesShares" xml:lang="en-US">Issuance Of Common Shares For Services Shares</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_IssuanceOfCommonSharesForServicesShares" xml:lang="en-US">Shares issued for services (Shares)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_IssuanceOfCommonSharesForServicesShares" xml:lang="en-US">Issuance of common shares for services (Shares)</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_IssuanceOfCommonSharesForServicesShares" xlink:to="lab_KH43H675K9M019J0H954_sdev_IssuanceOfCommonSharesForServicesShares"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_SubscriptionForCommonStock" xlink:label="loc_F4248H746F72_sdev_SubscriptionForCommonStock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_SubscriptionForCommonStock" xml:lang="en-US">Subscription For Common Stock</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_SubscriptionForCommonStock" xml:lang="en-US">Shares to be issued</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_SubscriptionForCommonStock" xml:lang="en-US">Subscription for common Stock</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_SubscriptionForCommonStock" xlink:to="lab_H6460J968H94_sdev_SubscriptionForCommonStock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xml:lang="en-US">Foreign currency translation</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xml:lang="en-US">Foreign currency translation</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_NotesToFinancialStatementsAbstract" xlink:label="loc_F4248H746F72_sdev_NotesToFinancialStatementsAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_NotesToFinancialStatementsAbstract" xml:lang="en-US">Notes to Financial Statements [Abstract]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_NotesToFinancialStatementsAbstract" xml:lang="en-US">Notes to Financial Statements [Abstract]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_NotesToFinancialStatementsAbstract" xlink:to="lab_H6460J968H94_sdev_NotesToFinancialStatementsAbstract"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BasisOfAccounting" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_BasisOfAccounting"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_BasisOfAccounting" xml:lang="en-US">BASIS OF PRESENTATION [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_BasisOfAccounting" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_BasisOfAccounting"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NatureOfOperations" xlink:label="loc_F4248H746F72_us-gaap_NatureOfOperations"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_NatureOfOperations" xml:lang="en-US">NATURE OF OPERATIONS AND GOING CONCERN [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_NatureOfOperations" xlink:to="lab_H6460J968H94_us-gaap_NatureOfOperations"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xml:lang="en-US">PROPERTY AND EQUIPMENT [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:label="loc_F4248H746F72_us-gaap_StockholdersEquityNoteDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xml:lang="en-US">CAPITAL STOCK [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:to="lab_H6460J968H94_us-gaap_StockholdersEquityNoteDisclosureTextBlock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock" xml:lang="en-US">STOCK BASED COMPENSATION AND WARRANTS [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockPurchaseWarrantsTextBlock" xlink:label="loc_F4248H746F72_sdev_StockPurchaseWarrantsTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_StockPurchaseWarrantsTextBlock" xml:lang="en-US">Stock Purchase Warrants [Text Block]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_StockPurchaseWarrantsTextBlock" xml:lang="en-US">STOCK PURCHASE OPTIONS AND WARRANTS [Text Block]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_StockPurchaseWarrantsTextBlock" xml:lang="en-US">STOCK PURCHASE WARRANTS [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_StockPurchaseWarrantsTextBlock" xlink:to="lab_H6460J968H94_sdev_StockPurchaseWarrantsTextBlock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_RelatedPartyTransactionsDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xml:lang="en-US">RELATED PARTY TRANSACTIONS [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_RelatedPartyTransactionsDisclosureTextBlock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_F4248H746F72_us-gaap_IncomeTaxDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_IncomeTaxDisclosureTextBlock" xml:lang="en-US">INCOME TAXES [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_IncomeTaxDisclosureTextBlock" xlink:to="lab_H6460J968H94_us-gaap_IncomeTaxDisclosureTextBlock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsDisclosureTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_CommitmentsDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_CommitmentsDisclosureTextBlock" xml:lang="en-US">COMMITMENTS [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_CommitmentsDisclosureTextBlock" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_CommitmentsDisclosureTextBlock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CollaborativeArrangementDisclosureTextBlock" xlink:label="loc_F4248H746F72_us-gaap_CollaborativeArrangementDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_CollaborativeArrangementDisclosureTextBlock" xml:lang="en-US">EXCLUSIVE SUPPLY AND PURCHASE AGREEMENTS [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_CollaborativeArrangementDisclosureTextBlock" xlink:to="lab_H6460J968H94_us-gaap_CollaborativeArrangementDisclosureTextBlock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DebtDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DebtDisclosureTextBlock" xml:lang="en-US">CONVERTIBLE DEBENTURES AND DEFERRED FINANCING COSTS [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DebtDisclosureTextBlock" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DebtDisclosureTextBlock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="loc_F4248H746F72_us-gaap_InventoryDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_InventoryDisclosureTextBlock" xml:lang="en-US">INVENTORY [Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_InventoryDisclosureTextBlock" xlink:to="lab_H6460J968H94_us-gaap_InventoryDisclosureTextBlock"/>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_SubsequentEventsTextBlock" xml:lang="en-US">SUBSEQUENT EVENTS [Text Block]</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueRecognitionAllowances" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_RevenueRecognitionAllowances"/>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="loc_F4248H746F72_us-gaap_EarningsPerSharePolicyTextBlock"/>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xml:lang="en-US">Stock-Based Compensation [Policy Text Block]</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:label="loc_F4248H746F72_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xml:lang="en-US">Foreign Currency [Policy Text Block]</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomePolicyPolicyTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ComprehensiveIncomePolicyPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ComprehensiveIncomePolicyPolicyTextBlock" xml:lang="en-US">Comprehensive loss [Policy Text Block]</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:label="loc_F4248H746F72_us-gaap_FairValueOfFinancialInstrumentsPolicy"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_FairValueOfFinancialInstrumentsPolicy" xml:lang="en-US">Financial Instruments [Policy Text Block]</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_FairValueMeasurementPolicyPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xml:lang="en-US">Fair Value Measurement [Policy Text Block]</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DebtPolicyTextBlock" xml:lang="en-US">Convertible debt instruments [Policy Text Block]</label>
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<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_IntellectualPropertyPolicyTextBlock" xlink:label="loc_IF21F453I7K897H8F732_sdev_IntellectualPropertyPolicyTextBlock"/>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:label="loc_F4248H746F72_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock"/>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xml:lang="en-US">Impairment of Long-lived Assets [Policy Text Block]</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_InventoryPolicyTextBlock" xml:lang="en-US">Inventories [Policy Text Block]</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConsolidationPolicyTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ConsolidationPolicyTextBlock"/>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="loc_F4248H746F72_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_CashAndCashEquivalentsPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xml:lang="en-US">Cash and cash equivalents [Policy Text Block]</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:label="loc_F4248H746F72_us-gaap_ResearchAndDevelopmentExpensePolicy"/>
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<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ConcentrationRiskCreditRiskPolicyTextBlock" xlink:label="loc_IF21F453I7K897H8F732_sdev_ConcentrationRiskCreditRiskPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ConcentrationRiskCreditRiskPolicyTextBlock" xml:lang="en-US">Concentration Risk Credit Risk Policy [Text Block]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_ConcentrationRiskCreditRiskPolicyTextBlock" xml:lang="en-US">Concentration of Credit Risk [Policy Text Block]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ConcentrationRiskCreditRiskPolicyTextBlock" xml:lang="en-US">Concentration of Credit Risk [Policy Text Block]</label>
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<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ScheduleOfDepreciationRatePlantAndEquipmentTableTextBlock" xlink:label="loc_F4248H746F72_sdev_ScheduleOfDepreciationRatePlantAndEquipmentTableTextBlock"/>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ScheduleOfDepreciationRatePlantAndEquipmentTableTextBlock" xml:lang="en-US">Schedule of Depreciation Rate, Plant and Equipment</label>
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<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PropertyPlantAndEquipmentTextBlock" xml:lang="en-US">Schedule of Property, Plant and Equipment [Table Text Block]</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock" xlink:label="loc_F4248H746F72_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock" xml:lang="en-US">Property, Plant and Equipment, Schedule of Significant Acquisitions and Disposals [Table Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock" xlink:to="lab_H6460J968H94_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardDateAxis" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_AwardDateAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AwardDateAxis" xml:lang="en-US">Award Date [Axis]</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardDateDomain" xlink:label="loc_F4248H746F72_us-gaap_AwardDateDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_AwardDateDomain" xml:lang="en-US">Award Date [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_AwardDateDomain" xlink:to="lab_H6460J968H94_us-gaap_AwardDateDomain"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockOptionsGrantedMarchTwoSevenTwoZeroOneSevenMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_StockOptionsGrantedMarchTwoSevenTwoZeroOneSevenMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedMarchTwoSevenTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted March Two Seven Two Zero One Seven [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedMarchTwoSevenTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted, March 27, 2017 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedMarchTwoSevenTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted, March 27, 2017</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_StockOptionsGrantedMarchTwoSevenTwoZeroOneSevenMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedMarchTwoSevenTwoZeroOneSevenMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockOptionsGrantedMayTwoSixTwoZeroOneSevenMember" xlink:label="loc_F4248H746F72_sdev_StockOptionsGrantedMayTwoSixTwoZeroOneSevenMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedMayTwoSixTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted May Two Six Two Zero One Seven [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedMayTwoSixTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted, May 26, 2017 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedMayTwoSixTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted, May 26, 2017</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_StockOptionsGrantedMayTwoSixTwoZeroOneSevenMember" xlink:to="lab_H6460J968H94_sdev_StockOptionsGrantedMayTwoSixTwoZeroOneSevenMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockOptionsGrantedJuneOneNineTwoZeroOneSevenMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_StockOptionsGrantedJuneOneNineTwoZeroOneSevenMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedJuneOneNineTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted June One Nine Two Zero One Seven [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedJuneOneNineTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted, June 19, 2017 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedJuneOneNineTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted, June 19, 2017</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_StockOptionsGrantedJuneOneNineTwoZeroOneSevenMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedJuneOneNineTwoZeroOneSevenMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockOptionsGrantedAugustOneZeroTwoZeroOneSevenMember" xlink:label="loc_F4248H746F72_sdev_StockOptionsGrantedAugustOneZeroTwoZeroOneSevenMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedAugustOneZeroTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted August One Zero Two Zero One Seven [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedAugustOneZeroTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted, August 10, 2017 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedAugustOneZeroTwoZeroOneSevenMember" xml:lang="en-US">Stock Options Granted, August 10, 2017</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_StockOptionsGrantedAugustOneZeroTwoZeroOneSevenMember" xlink:to="lab_H6460J968H94_sdev_StockOptionsGrantedAugustOneZeroTwoZeroOneSevenMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockOptionsGrantedAugustOneEightTwoZeroOneSixMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_StockOptionsGrantedAugustOneEightTwoZeroOneSixMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedAugustOneEightTwoZeroOneSixMember" xml:lang="en-US">Stock Options Granted August One Eight Two Zero One Six [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedAugustOneEightTwoZeroOneSixMember" xml:lang="en-US">Stock Options Granted, August 18, 2016 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedAugustOneEightTwoZeroOneSixMember" xml:lang="en-US">Stock Options Granted, August 18, 2016</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_StockOptionsGrantedAugustOneEightTwoZeroOneSixMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedAugustOneEightTwoZeroOneSixMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockOptionsGrantedOctoberTwoZeroTwoZeroOneSixMember" xlink:label="loc_F4248H746F72_sdev_StockOptionsGrantedOctoberTwoZeroTwoZeroOneSixMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedOctoberTwoZeroTwoZeroOneSixMember" xml:lang="en-US">Stock Options Granted October Two Zero Two Zero One Six [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedOctoberTwoZeroTwoZeroOneSixMember" xml:lang="en-US">Stock Options Granted, October 20, 2016 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedOctoberTwoZeroTwoZeroOneSixMember" xml:lang="en-US">Stock Options Granted, October 20, 2016</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_StockOptionsGrantedOctoberTwoZeroTwoZeroOneSixMember" xlink:to="lab_H6460J968H94_sdev_StockOptionsGrantedOctoberTwoZeroTwoZeroOneSixMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockOptionsGrantedOctoberTwentyTwoTwoThousandEighteenMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_StockOptionsGrantedOctoberTwentyTwoTwoThousandEighteenMember_1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedOctoberTwentyTwoTwoThousandEighteenMember" xml:lang="en-US">Stock Options Granted October Twenty Two Two Thousand Eighteen Member</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedOctoberTwentyTwoTwoThousandEighteenMember" xml:lang="en-US">Stock Options Granted, October 22, 2018 [Member]</label>

<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_StockOptionsGrantedOctoberTwentyTwoTwoThousandEighteenMember_1" xlink:to="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedOctoberTwentyTwoTwoThousandEighteenMember"/><label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockOptionsGrantedOctoberTwentyTwoTwoThousandEighteenMember" xml:lang="en-US">Stock Options Granted, October22, 2018</label>


<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockOptionsGrantedAprilOneThreeTwoZeroOneEightMember" xlink:label="loc_F4248H746F72_sdev_StockOptionsGrantedAprilOneThreeTwoZeroOneEightMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedAprilOneThreeTwoZeroOneEightMember" xml:lang="en-US">Stock Options Granted April One Three Two Zero One Eight [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedAprilOneThreeTwoZeroOneEightMember" xml:lang="en-US">Stock Options Granted, April 13, 2018 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_StockOptionsGrantedAprilOneThreeTwoZeroOneEightMember" xml:lang="en-US">Stock Options Granted, April 13, 2018</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_StockOptionsGrantedAprilOneThreeTwoZeroOneEightMember" xlink:to="lab_H6460J968H94_sdev_StockOptionsGrantedAprilOneThreeTwoZeroOneEightMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_WarrantsGrantedOctoberTwentyTwoTwoThousandEighteenMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_WarrantsGrantedOctoberTwentyTwoTwoThousandEighteenMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_WarrantsGrantedOctoberTwentyTwoTwoThousandEighteenMember" xml:lang="en-US">Warrants Granted October Twenty Two Two Thousand Eighteen [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_WarrantsGrantedOctoberTwentyTwoTwoThousandEighteenMember" xml:lang="en-US">Warrants Granted, October 22, 2018 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_WarrantsGrantedOctoberTwentyTwoTwoThousandEighteenMember" xml:lang="en-US">Warrants Granted, October 22, 2018</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_WarrantsGrantedOctoberTwentyTwoTwoThousandEighteenMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_WarrantsGrantedOctoberTwentyTwoTwoThousandEighteenMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_WarrantsGrantedDecemberThreeTwoThousandEighteenMember" xlink:label="loc_F4248H746F72_sdev_WarrantsGrantedDecemberThreeTwoThousandEighteenMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_WarrantsGrantedDecemberThreeTwoThousandEighteenMember" xml:lang="en-US">Warrants Granted December Three Two Thousand Eighteen [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_sdev_WarrantsGrantedDecemberThreeTwoThousandEighteenMember" xml:lang="en-US">Warrants Granted, December 3, 2018 [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_WarrantsGrantedDecemberThreeTwoThousandEighteenMember" xlink:to="lab_H6460J968H94_sdev_WarrantsGrantedDecemberThreeTwoThousandEighteenMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_AwardTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AwardTypeAxis" xml:lang="en-US">Award Type [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_AwardTypeAxis" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_AwardTypeAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_F4248H746F72_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xml:lang="en-US">Equity Award [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WarrantMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_WarrantMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_WarrantMember" xml:lang="en-US">Warrant [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_WarrantMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_WarrantMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_F4248H746F72_us-gaap_EmployeeStockOptionMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_EmployeeStockOptionMember" xml:lang="en-US">Employee Stock Option [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_EmployeeStockOptionMember" xlink:to="lab_H6460J968H94_us-gaap_EmployeeStockOptionMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xml:lang="en-US">Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ScheduleOfSharebasedPaymentAwardWarrantsValuationAssumptionsTableTextBlock" xlink:label="loc_F4248H746F72_sdev_ScheduleOfSharebasedPaymentAwardWarrantsValuationAssumptionsTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ScheduleOfSharebasedPaymentAwardWarrantsValuationAssumptionsTableTextBlock" xml:lang="en-US">Schedule Of Share based Payment Award Warrants Valuation Assumptions [Table Text Block]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_ScheduleOfSharebasedPaymentAwardWarrantsValuationAssumptionsTableTextBlock" xml:lang="en-US">Schedule of Share-based Payment Award, Warrants, Valuation Assumptions [Table Text Block]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ScheduleOfSharebasedPaymentAwardWarrantsValuationAssumptionsTableTextBlock" xml:lang="en-US">Schedule of Share-based Payment Award, Warrants, Valuation Assumptions</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ScheduleOfSharebasedPaymentAwardWarrantsValuationAssumptionsTableTextBlock" xlink:to="lab_H6460J968H94_sdev_ScheduleOfSharebasedPaymentAwardWarrantsValuationAssumptionsTableTextBlock"/>
































<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_LongtermDebtTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_LongtermDebtTypeAxis" xml:lang="en-US">Long-term Debt, Type [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_LongtermDebtTypeAxis" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_LongtermDebtTypeAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_F4248H746F72_us-gaap_LongtermDebtTypeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_LongtermDebtTypeDomain" xml:lang="en-US">Long-term Debt, Type [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_LongtermDebtTypeDomain" xlink:to="lab_H6460J968H94_us-gaap_LongtermDebtTypeDomain"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_SeriesBConvertibleSecuredDebenturesDecemberSevenTwoZeroOneSixMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_SeriesBConvertibleSecuredDebenturesDecemberSevenTwoZeroOneSixMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_SeriesBConvertibleSecuredDebenturesDecemberSevenTwoZeroOneSixMember" xml:lang="en-US">Series B Convertible Secured Debentures December Seven Two Zero One Six [Member]</label>
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<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_SecuredConvertibleDebenturesOctoberTwentyTwoTwoZeroOneEightMember" xlink:label="loc_F4248H746F72_sdev_SecuredConvertibleDebenturesOctoberTwentyTwoTwoZeroOneEightMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_SecuredConvertibleDebenturesOctoberTwentyTwoTwoZeroOneEightMember" xml:lang="en-US">Secured Convertible Debentures October Twenty Two Two Zero One Eight [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_SecuredConvertibleDebenturesOctoberTwentyTwoTwoZeroOneEightMember" xml:lang="en-US">Secured Convertible Debentures October 22, 2018 [Member]</label>
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<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_OneFiveZeroZeroZeroZeroZeroOneZeroSecuredConvertibleDebentureMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_OneFiveZeroZeroZeroZeroZeroOneZeroSecuredConvertibleDebentureMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_OneFiveZeroZeroZeroZeroZeroOneZeroSecuredConvertibleDebentureMember" xml:lang="en-US">One Five Zero Zero Zero Zero Zero One Zero Secured Convertible Debenture [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_OneFiveZeroZeroZeroZeroZeroOneZeroSecuredConvertibleDebentureMember" xml:lang="en-US">$1,500,000 10% secured convertible debenture [Member]</label>
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<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ScheduleOfSecuredConvertibleDebenturesAllocationOfThePurchaseTableTextBlock" xlink:label="loc_IF21F453I7K897H8F732_sdev_ScheduleOfSecuredConvertibleDebenturesAllocationOfThePurchaseTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ScheduleOfSecuredConvertibleDebenturesAllocationOfThePurchaseTableTextBlock" xml:lang="en-US">Schedule of Secured Convertible Debentures, Allocation of the Purchase [Table Text Block]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ScheduleOfSecuredConvertibleDebenturesAllocationOfThePurchaseTableTextBlock" xml:lang="en-US">Schedule of Secured Convertible Debentures, Allocation of the Purchase</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDerivativeLiabilitiesAtFairValueTableTextBlock" xlink:label="loc_F4248H746F72_us-gaap_ScheduleOfDerivativeLiabilitiesAtFairValueTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ScheduleOfDerivativeLiabilitiesAtFairValueTableTextBlock" xml:lang="en-US">Schedule of Derivative Liabilities at Fair Value [Table Text Block]</label>
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<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ScheduleOfDerivativeIntrumentsAmountsReflectedInIncomeTableTextBlock" xlink:label="loc_IF21F453I7K897H8F732_sdev_ScheduleOfDerivativeIntrumentsAmountsReflectedInIncomeTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ScheduleOfDerivativeIntrumentsAmountsReflectedInIncomeTableTextBlock" xml:lang="en-US">Schedule of Derivative Instruments, Amounts reflected in Income [Table Text Block]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ScheduleOfDerivativeIntrumentsAmountsReflectedInIncomeTableTextBlock" xml:lang="en-US">Schedule of Derivative Instruments, Amounts reflected in Income</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsTextBlock" xlink:label="loc_F4248H746F72_us-gaap_ScheduleOfDerivativeInstrumentsTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ScheduleOfDerivativeInstrumentsTextBlock" xml:lang="en-US">Schedule of Derivative Instruments [Table Text Block]</label>
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<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ScheduleOfSharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsMethodUsedTableTextBlock" xlink:label="loc_IF21F453I7K897H8F732_sdev_ScheduleOfSharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsMethodUsedTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ScheduleOfSharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsMethodUsedTableTextBlock" xml:lang="en-US">Schedule Of Share based Compensation Arrangement By Share based Payment Award Fair Value Assumptions Method Used [Table Text Block]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_ScheduleOfSharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsMethodUsedTableTextBlock" xml:lang="en-US">Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used [Table Text Block]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ScheduleOfSharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsMethodUsedTableTextBlock" xml:lang="en-US">Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ScheduleOfSharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsMethodUsedTableTextBlock" xlink:to="lab_KH43H675K9M019J0H954_sdev_ScheduleOfSharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsMethodUsedTableTextBlock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_F4248H746F72_us-gaap_StatementBusinessSegmentsAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_StatementBusinessSegmentsAxis" xml:lang="en-US">Segments [Axis]</label>
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<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_SegmentDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SegmentDomain" xml:lang="en-US">Segment [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_SegmentDomain" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_SegmentDomain"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SalesMember" xlink:label="loc_F4248H746F72_us-gaap_SalesMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_SalesMember" xml:lang="en-US">Sales [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_SalesMember" xlink:to="lab_H6460J968H94_us-gaap_SalesMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_AssetsMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AssetsMember" xml:lang="en-US">Assets [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_AssetsMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_AssetsMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xlink:label="loc_F4248H746F72_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xml:lang="en-US">Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xlink:to="lab_H6460J968H94_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table Text Block]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock"/>



<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TitleOfIndividualAxis" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_TitleOfIndividualAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_TitleOfIndividualAxis" xml:lang="en-US">Title of Individual [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_TitleOfIndividualAxis" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_TitleOfIndividualAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_F4248H746F72_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xml:lang="en-US">Relationship to Entity [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:to="lab_H6460J968H94_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ChiefLegalOfficerMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_ChiefLegalOfficerMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ChiefLegalOfficerMember" xml:lang="en-US">Chief Legal Officer [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_ChiefLegalOfficerMember" xml:lang="en-US">Chief Legal Officer ("CLO")</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ChiefLegalOfficerMember" xml:lang="en-US">Member represents handle day to day legal activity.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ChiefLegalOfficerMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_ChiefLegalOfficerMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ChiefTechnologyOfficerMember" xlink:label="loc_F4248H746F72_sdev_ChiefTechnologyOfficerMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ChiefTechnologyOfficerMember" xml:lang="en-US">Chief Technology Officer [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_ChiefTechnologyOfficerMember" xml:lang="en-US">Chief Technology Officer [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ChiefTechnologyOfficerMember" xml:lang="en-US">Member represents handle day to day technological activity.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ChiefTechnologyOfficerMember" xlink:to="lab_H6460J968H94_sdev_ChiefTechnologyOfficerMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PaulJensenMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_PaulJensenMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaulJensenMember" xml:lang="en-US">Paul Jensen [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaulJensenMember" xml:lang="en-US">Paul Jensen ("Jensen")</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaulJensenMember" xml:lang="en-US">Paul Jensen</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_PaulJensenMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_PaulJensenMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_BryanGanzMember" xlink:label="loc_F4248H746F72_sdev_BryanGanzMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_BryanGanzMember" xml:lang="en-US">Bryan Ganz [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_BryanGanzMember" xml:lang="en-US">Bryan Ganz</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_BryanGanzMember" xml:lang="en-US">Bryan Ganz</label>
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<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PaulJensenTwoMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_PaulJensenTwoMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaulJensenTwoMember" xml:lang="en-US">Paul Jensen Two [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaulJensenTwoMember" xml:lang="en-US">Paul Jensen 2</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaulJensenTwoMember" xml:lang="en-US">Paul Jensen 2</label>
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<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_DeanThrasherMember" xlink:label="loc_F4248H746F72_sdev_DeanThrasherMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_DeanThrasherMember" xml:lang="en-US">Dean Thrasher [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_DeanThrasherMember" xml:lang="en-US">Dean Thrasher ("Thrasher")</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_DeanThrasherMember" xml:lang="en-US">Dean thrasher member.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_DeanThrasherMember" xlink:to="lab_H6460J968H94_sdev_DeanThrasherMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis" xml:lang="en-US">Equity issuance [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:label="loc_F4248H746F72_us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xml:lang="en-US">Equity issuance [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:to="lab_H6460J968H94_us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_NortheastIndustrialPartnersLlpMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_NortheastIndustrialPartnersLlpMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_NortheastIndustrialPartnersLlpMember" xml:lang="en-US">Northeast Industrial Partners LLP [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_NortheastIndustrialPartnersLlpMember" xml:lang="en-US">Northeast Industrial Partners ("NEIP")</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_NortheastIndustrialPartnersLlpMember" xml:lang="en-US">Northeast Industrial Partners LLP</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_NortheastIndustrialPartnersLlpMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_NortheastIndustrialPartnersLlpMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_FintekkApLlcMember" xlink:label="loc_F4248H746F72_sdev_FintekkApLlcMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_FintekkApLlcMember" xml:lang="en-US">Fintekk Ap, Llc [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_FintekkApLlcMember" xml:lang="en-US">FinTekk AP, LLC ("FinTekk")</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_FintekkApLlcMember" xml:lang="en-US">Represents FinTekk AP, LLC ("FinTekk") member.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_FintekkApLlcMember" xlink:to="lab_H6460J968H94_sdev_FintekkApLlcMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_TypeOfArrangementAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_TypeOfArrangementAxis" xml:lang="en-US">Type of Arrangement and Non-arrangement Transactions [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_TypeOfArrangementAxis" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_TypeOfArrangementAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_F4248H746F72_us-gaap_ArrangementsAndNonarrangementTransactionsMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ArrangementsAndNonarrangementTransactionsMember" xml:lang="en-US">Arrangements and Non-arrangement Transactions [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:to="lab_H6460J968H94_us-gaap_ArrangementsAndNonarrangementTransactionsMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ConsultingAgreementMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_ConsultingAgreementMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ConsultingAgreementMember" xml:lang="en-US">Consulting Agreement [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_ConsultingAgreementMember" xml:lang="en-US">Consulting agreement</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ConsultingAgreementMember" xml:lang="en-US">Represents consulting agreement member.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ConsultingAgreementMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_ConsultingAgreementMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_EmploymentAgreementMember" xlink:label="loc_F4248H746F72_sdev_EmploymentAgreementMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_EmploymentAgreementMember" xml:lang="en-US">Employment Agreement [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_EmploymentAgreementMember" xml:lang="en-US">Employment Agreement</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_EmploymentAgreementMember" xml:lang="en-US">Represents employment agreement member.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_EmploymentAgreementMember" xlink:to="lab_H6460J968H94_sdev_EmploymentAgreementMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_DebtSettlementAgreementMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_DebtSettlementAgreementMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_DebtSettlementAgreementMember" xml:lang="en-US">Debt Settlement Agreement [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_DebtSettlementAgreementMember" xml:lang="en-US">Debt settlement agreement</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_DebtSettlementAgreementMember" xml:lang="en-US">Debt settlement agreement.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_DebtSettlementAgreementMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_DebtSettlementAgreementMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharesIssuedPricePerShare" xlink:label="loc_F4248H746F72_us-gaap_SharesIssuedPricePerShare"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_SharesIssuedPricePerShare" xml:lang="en-US">Shares Issued, Price Per Share</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_SharesIssuedPricePerShare" xml:lang="en-US">Shares Issued, Price Per Share</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_SharesIssuedPricePerShare" xml:lang="en-US">Shares Issued, Price Per Share</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_SharesIssuedPricePerShare" xlink:to="lab_H6460J968H94_us-gaap_SharesIssuedPricePerShare"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_PaymentsOfStockIssuanceCosts"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PaymentsOfStockIssuanceCosts" xml:lang="en-US">Payments of Stock Issuance Costs</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PaymentsOfStockIssuanceCosts" xml:lang="en-US">Payments of Stock Issuance Costs</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_PaymentsOfStockIssuanceCosts" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_PaymentsOfStockIssuanceCosts"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PaymentsForConsultantServices" xlink:label="loc_F4248H746F72_sdev_PaymentsForConsultantServices"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_PaymentsForConsultantServices" xml:lang="en-US">Payments For Consultant Services</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_PaymentsForConsultantServices" xml:lang="en-US">Payments for consultant services</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_PaymentsForConsultantServices" xml:lang="en-US">Payments for consultant services</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_PaymentsForConsultantServices" xlink:to="lab_H6460J968H94_sdev_PaymentsForConsultantServices"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_PrepaidExpenseCurrentAndNoncurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PrepaidExpenseCurrentAndNoncurrent" xml:lang="en-US">Prepaid Expense</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PrepaidExpenseCurrentAndNoncurrent" xml:lang="en-US">Prepaid expense</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_PrepaidExpenseCurrentAndNoncurrent"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_TwoZeroOneThreeStockOptionPlanMember" xlink:label="loc_F4248H746F72_sdev_TwoZeroOneThreeStockOptionPlanMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_TwoZeroOneThreeStockOptionPlanMember" xml:lang="en-US">Two Zero One Three Stock Option Plan [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_TwoZeroOneThreeStockOptionPlanMember" xml:lang="en-US">2013 Stock Option Plan [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_TwoZeroOneThreeStockOptionPlanMember" xml:lang="en-US">2013 Stock Option Plan</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_TwoZeroOneThreeStockOptionPlanMember" xlink:to="lab_H6460J968H94_sdev_TwoZeroOneThreeStockOptionPlanMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_RevisedStockOptionPlanMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_RevisedStockOptionPlanMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_RevisedStockOptionPlanMember" xml:lang="en-US">Revised Stock Option Plan [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_RevisedStockOptionPlanMember" xml:lang="en-US">Revised Stock Option Plan</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_RevisedStockOptionPlanMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_RevisedStockOptionPlanMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_JStreicherCapitalLlcTheAgentMember" xlink:label="loc_F4248H746F72_sdev_JStreicherCapitalLlcTheAgentMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_JStreicherCapitalLlcTheAgentMember" xml:lang="en-US">J Streicher Capital, LLC (the Agent) [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_JStreicherCapitalLlcTheAgentMember" xml:lang="en-US">J Streicher Capital, LLC (the Agent)</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_JStreicherCapitalLlcTheAgentMember" xlink:to="lab_H6460J968H94_sdev_JStreicherCapitalLlcTheAgentMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_OptionsToDirectorsMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_OptionsToDirectorsMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_OptionsToDirectorsMember" xml:lang="en-US">Options to directors [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_OptionsToDirectorsMember" xml:lang="en-US">Options to directors</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_OptionsToDirectorsMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_OptionsToDirectorsMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_OptionsToAConsultantMember" xlink:label="loc_F4248H746F72_sdev_OptionsToAConsultantMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_OptionsToAConsultantMember" xml:lang="en-US">Options to a consultant [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_OptionsToAConsultantMember" xml:lang="en-US">Options to a consultant</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_OptionsToAConsultantMember" xlink:to="lab_H6460J968H94_sdev_OptionsToAConsultantMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_OptionsToTheCeoMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_OptionsToTheCeoMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_OptionsToTheCeoMember" xml:lang="en-US">Options to the CEO [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_OptionsToTheCeoMember" xml:lang="en-US">Options to the CEO</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_OptionsToTheCeoMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_OptionsToTheCeoMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_OptionsToTheCtoMember" xlink:label="loc_F4248H746F72_sdev_OptionsToTheCtoMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_OptionsToTheCtoMember" xml:lang="en-US">Options to the CTO [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_OptionsToTheCtoMember" xml:lang="en-US">Options to the CTO</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_OptionsToTheCtoMember" xlink:to="lab_H6460J968H94_sdev_OptionsToTheCtoMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsOneMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsOneMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsOneMember" xml:lang="en-US">Batch Of Five Zero Zero Zero Zero Zero Options One [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsOneMember" xml:lang="en-US">Batch of 500,000 options 1 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsOneMember" xml:lang="en-US">Batch of 500,000 options 1</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsOneMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsOneMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsTwoMember" xlink:label="loc_F4248H746F72_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsTwoMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsTwoMember" xml:lang="en-US">Batch Of Five Zero Zero Zero Zero Zero Options Two [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsTwoMember" xml:lang="en-US">Batch of 500,000 options 2 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsTwoMember" xml:lang="en-US">Batch of 500,000 options 2</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsTwoMember" xlink:to="lab_H6460J968H94_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsTwoMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsThreeMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsThreeMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsThreeMember" xml:lang="en-US">Batch Of Five Zero Zero Zero Zero Zero Options Three [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsThreeMember" xml:lang="en-US">Batch of 500,000 options 3 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsThreeMember" xml:lang="en-US">Batch of 500,000 options 3</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsThreeMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_BatchOfFiveZeroZeroZeroZeroZeroOptionsThreeMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="loc_F4248H746F72_us-gaap_MeasurementInputTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_MeasurementInputTypeAxis" xml:lang="en-US">Measurement Input Type [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_MeasurementInputTypeAxis" xlink:to="lab_H6460J968H94_us-gaap_MeasurementInputTypeAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_MeasurementInputTypeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_MeasurementInputTypeDomain" xml:lang="en-US">Measurement Input Type [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_MeasurementInputTypeDomain" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_MeasurementInputTypeDomain"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:label="loc_F4248H746F72_us-gaap_MeasurementInputRiskFreeInterestRateMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_MeasurementInputRiskFreeInterestRateMember" xml:lang="en-US">Risk free rate [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:to="lab_H6460J968H94_us-gaap_MeasurementInputRiskFreeInterestRateMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputExpectedDividendRateMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_MeasurementInputExpectedDividendRateMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_MeasurementInputExpectedDividendRateMember" xml:lang="en-US">Expected dividends [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_MeasurementInputExpectedDividendRateMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_MeasurementInputExpectedDividendRateMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_MeasurementInputForfeitureRateMember" xlink:label="loc_F4248H746F72_sdev_MeasurementInputForfeitureRateMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_MeasurementInputForfeitureRateMember" xml:lang="en-US">Measurement Input Forfeiture Rate [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_MeasurementInputForfeitureRateMember" xml:lang="en-US">Expected forfeiture rate [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_MeasurementInputForfeitureRateMember" xml:lang="en-US">Measurement input forfeiture rate</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_MeasurementInputForfeitureRateMember" xlink:to="lab_H6460J968H94_sdev_MeasurementInputForfeitureRateMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputPriceVolatilityMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_MeasurementInputPriceVolatilityMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_MeasurementInputPriceVolatilityMember" xml:lang="en-US">Volatility [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_MeasurementInputPriceVolatilityMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_MeasurementInputPriceVolatilityMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputSharePriceMember" xlink:label="loc_F4248H746F72_us-gaap_MeasurementInputSharePriceMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_MeasurementInputSharePriceMember" xml:lang="en-US">Market price of stock [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_MeasurementInputSharePriceMember" xlink:to="lab_H6460J968H94_us-gaap_MeasurementInputSharePriceMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputExpectedTermMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_MeasurementInputExpectedTermMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_MeasurementInputExpectedTermMember" xml:lang="en-US">Expected life [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_MeasurementInputExpectedTermMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_MeasurementInputExpectedTermMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_SecuritiesPurchaseAgreementMember" xlink:label="loc_F4248H746F72_sdev_SecuritiesPurchaseAgreementMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_SecuritiesPurchaseAgreementMember" xml:lang="en-US">Securities Purchase Agreement [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_SecuritiesPurchaseAgreementMember" xml:lang="en-US">Securities purchase agreement [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_SecuritiesPurchaseAgreementMember" xml:lang="en-US">Represent the securities purchase agreement with several accredited investors.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_SecuritiesPurchaseAgreementMember" xlink:to="lab_H6460J968H94_sdev_SecuritiesPurchaseAgreementMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xml:lang="en-US">Related Party [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_F4248H746F72_us-gaap_RelatedPartyDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_RelatedPartyDomain" xml:lang="en-US">Related Party [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_RelatedPartyDomain" xlink:to="lab_H6460J968H94_us-gaap_RelatedPartyDomain"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_AccreditedInvestorsMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_AccreditedInvestorsMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_AccreditedInvestorsMember" xml:lang="en-US">Accredited Investors [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_AccreditedInvestorsMember" xml:lang="en-US">Accredited investors [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_AccreditedInvestorsMember" xml:lang="en-US">Represent accredited investors.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_AccreditedInvestorsMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_AccreditedInvestorsMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnsecuredDebtMember" xlink:label="loc_F4248H746F72_us-gaap_UnsecuredDebtMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_UnsecuredDebtMember" xml:lang="en-US">Unsecured Convertible Debentures [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_UnsecuredDebtMember" xml:lang="en-US">Unsecured Convertible Debentures [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_UnsecuredDebtMember" xlink:to="lab_H6460J968H94_us-gaap_UnsecuredDebtMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_Directors1Member" xlink:label="loc_IF21F453I7K897H8F732_sdev_Directors1Member"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_Directors1Member" xml:lang="en-US">Directors1 [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_Directors1Member" xml:lang="en-US">Directors [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_Directors1Member" xml:lang="en-US">Person serving on the board of directors (who collectively have responsibility for governing the entity).</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_Directors1Member" xlink:to="lab_KH43H675K9M019J0H954_sdev_Directors1Member"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ConsultantMember" xlink:label="loc_F4248H746F72_sdev_ConsultantMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ConsultantMember" xml:lang="en-US">Consultant [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_ConsultantMember" xml:lang="en-US">Consultant</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ConsultantMember" xml:lang="en-US">This member stands for consultant.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ConsultantMember" xlink:to="lab_H6460J968H94_sdev_ConsultantMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ChiefExecutiveOfficersMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_ChiefExecutiveOfficersMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ChiefExecutiveOfficersMember" xml:lang="en-US">Chief Executive Officers [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ChiefExecutiveOfficersMember" xml:lang="en-US">Highest ranking executive officer, who has ultimate managerial responsibility for the entity and who reports to the board of directors. In addition, the chief executive officer (CEO) may also be the chairman of the board or president.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ChiefExecutiveOfficersMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_ChiefExecutiveOfficersMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_EmployeeMember" xlink:label="loc_F4248H746F72_sdev_EmployeeMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_EmployeeMember" xml:lang="en-US">Employee [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_EmployeeMember" xml:lang="en-US">This member stands for employee.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_EmployeeMember" xlink:to="lab_H6460J968H94_sdev_EmployeeMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_NewDirectorMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_NewDirectorMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_NewDirectorMember" xml:lang="en-US">New Director [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_NewDirectorMember" xml:lang="en-US">Represent the new director.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_NewDirectorMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_NewDirectorMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_UnitsIssuedDuringPeriod" xlink:label="loc_F4248H746F72_sdev_UnitsIssuedDuringPeriod"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_UnitsIssuedDuringPeriod" xml:lang="en-US">Units Issued During Period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_UnitsIssuedDuringPeriod" xml:lang="en-US">Units Issued During Period, Units</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_UnitsIssuedDuringPeriod" xml:lang="en-US">Units Issued During Period, Units</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_UnitsIssuedDuringPeriod" xlink:to="lab_H6460J968H94_sdev_UnitsIssuedDuringPeriod"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_UnitsIssuedDuringPeriodValue" xlink:label="loc_IF21F453I7K897H8F732_sdev_UnitsIssuedDuringPeriodValue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_UnitsIssuedDuringPeriodValue" xml:lang="en-US">Units Issued During Period Value</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_UnitsIssuedDuringPeriodValue" xml:lang="en-US">Units Issued During Period, Value</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_UnitsIssuedDuringPeriodValue" xml:lang="en-US">Units Issued During Period, Value</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_UnitsIssuedDuringPeriodValue" xlink:to="lab_KH43H675K9M019J0H954_sdev_UnitsIssuedDuringPeriodValue"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ClassOfWarrantOrRightGrantsInPeriod" xlink:label="loc_F4248H746F72_sdev_ClassOfWarrantOrRightGrantsInPeriod"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ClassOfWarrantOrRightGrantsInPeriod" xml:lang="en-US">Class Of Warrant Or Right Grants In Period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_ClassOfWarrantOrRightGrantsInPeriod" xml:lang="en-US">Class of Warrant or Right, Grants in Period, Net of Forfeitures</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ClassOfWarrantOrRightGrantsInPeriod" xml:lang="en-US">Class of Warrant or Right, Grants in Period, Net of Forfeitures</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ClassOfWarrantOrRightGrantsInPeriod" xlink:to="lab_H6460J968H94_sdev_ClassOfWarrantOrRightGrantsInPeriod"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ClassOfWarrantOrRightGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_IF21F453I7K897H8F732_sdev_ClassOfWarrantOrRightGrantsInPeriodWeightedAverageExercisePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodWeightedAverageExercisePrice" xml:lang="en-US">Class Of Warrant Or Right Grants In Period Weighted Average Exercise Price</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodWeightedAverageExercisePrice" xml:lang="en-US">Class of Warrant or Right, Grants in Period, Weighted Average Exercise Price</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodWeightedAverageExercisePrice" xml:lang="en-US">Class of Warrant or Right, Grants in Period, Weighted Average Exercise Price</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ClassOfWarrantOrRightGrantsInPeriodWeightedAverageExercisePrice" xlink:to="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodWeightedAverageExercisePrice"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="loc_F4248H746F72_us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xml:lang="en-US">Stock Issued During Period, Shares, New Issues</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xml:lang="en-US">Stock issued during period, shares, new issues</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="lab_H6460J968H94_us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ClassOfWarrantOrRightGrantsInPeriodValue" xlink:label="loc_IF21F453I7K897H8F732_sdev_ClassOfWarrantOrRightGrantsInPeriodValue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodValue" xml:lang="en-US">Class Of Warrant Or Right Grants In Period Value</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodValue" xml:lang="en-US">Warrants Issued During Period, Value</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodValue" xml:lang="en-US">Warrants Issued During Period, Value</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ClassOfWarrantOrRightGrantsInPeriodValue" xlink:to="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodValue"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xlink:label="loc_F4248H746F72_us-gaap_WarrantsAndRightsOutstandingMeasurementInput"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xml:lang="en-US">Warrants and Rights Outstanding, Measurement Input</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xml:lang="en-US">Warrants and Rights Outstanding, Measurement Input</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xlink:to="lab_H6460J968H94_us-gaap_WarrantsAndRightsOutstandingMeasurementInput"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_F4248H746F72_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xml:lang="en-US">Options granted during the year, weighted average exercise price</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:to="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_AllocatedShareBasedCompensationExpense"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AllocatedShareBasedCompensationExpense" xml:lang="en-US">Allocated Share-based Compensation Expense</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AllocatedShareBasedCompensationExpense" xml:lang="en-US">Allocated Share-based Compensation Expense</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AllocatedShareBasedCompensationExpense" xml:lang="en-US">Stock-based compensation cost expensed</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_AllocatedShareBasedCompensationExpense"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ClassOfWarrantOrRightExpirationDateExtendedNumberOfWarrants" xlink:label="loc_F4248H746F72_sdev_ClassOfWarrantOrRightExpirationDateExtendedNumberOfWarrants"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ClassOfWarrantOrRightExpirationDateExtendedNumberOfWarrants" xml:lang="en-US">Class Of Warrant Or Right Expiration Date Extended Number Of Warrants</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_sdev_ClassOfWarrantOrRightExpirationDateExtendedNumberOfWarrants" xml:lang="en-US">Class of Warrant or Right, Expiration date extended, number of warrants</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_ClassOfWarrantOrRightExpirationDateExtendedNumberOfWarrants" xml:lang="en-US">Class of Warrant or Right, Expiration date extended, number of warrants</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ClassOfWarrantOrRightExpirationDateExtendedNumberOfWarrants" xml:lang="en-US">Class of Warrant or Right, Expiration date extended, number of warrants</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ClassOfWarrantOrRightExpirationDateExtendedNumberOfWarrants" xlink:to="lab_H6460J968H94_sdev_ClassOfWarrantOrRightExpirationDateExtendedNumberOfWarrants"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ClassOfWarrantOrRightExpirationDateExtendedIncreaseInValue" xlink:label="loc_IF21F453I7K897H8F732_sdev_ClassOfWarrantOrRightExpirationDateExtendedIncreaseInValue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightExpirationDateExtendedIncreaseInValue" xml:lang="en-US">Class Of Warrant Or Right Expiration Date Extended Increase In Value</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightExpirationDateExtendedIncreaseInValue" xml:lang="en-US">Class of Warrant or Right, Expiration date extended, increase in value</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightExpirationDateExtendedIncreaseInValue" xml:lang="en-US">Class of Warrant or Right, Expiration date extended, increase in value</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ClassOfWarrantOrRightExpirationDateExtendedIncreaseInValue" xlink:to="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightExpirationDateExtendedIncreaseInValue"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:label="loc_F4248H746F72_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xml:lang="en-US">Unvested stock-based compensation expense</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:to="lab_H6460J968H94_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockBasedCompensationExpenseVestingOfOptions" xlink:label="loc_IF21F453I7K897H8F732_sdev_StockBasedCompensationExpenseVestingOfOptions"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockBasedCompensationExpenseVestingOfOptions" xml:lang="en-US">Stock Based Compensation Expense Vesting Of Options</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockBasedCompensationExpenseVestingOfOptions" xml:lang="en-US">Stock-based compensation expense, vesting of options</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockBasedCompensationExpenseVestingOfOptions" xml:lang="en-US">Stock-based compensation expense, vesting of options</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockBasedCompensationExpenseVestingOfOptions" xml:lang="en-US">Stock-based compensation expense, vesting of options</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_StockBasedCompensationExpenseVestingOfOptions" xlink:to="lab_KH43H675K9M019J0H954_sdev_StockBasedCompensationExpenseVestingOfOptions"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockOptionTriggerPrice" xlink:label="loc_F4248H746F72_sdev_StockOptionTriggerPrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_StockOptionTriggerPrice" xml:lang="en-US">Stock Option Trigger Price</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_sdev_StockOptionTriggerPrice" xml:lang="en-US">Stock option, trigger price</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_StockOptionTriggerPrice" xml:lang="en-US">Stock option, trigger price</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_StockOptionTriggerPrice" xml:lang="en-US">Stock option, trigger price</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_StockOptionTriggerPrice" xlink:to="lab_H6460J968H94_sdev_StockOptionTriggerPrice"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WarrantsAndRightsOutstanding" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_WarrantsAndRightsOutstanding"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_WarrantsAndRightsOutstanding" xml:lang="en-US">Warrants and Rights Outstanding</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_WarrantsAndRightsOutstanding" xml:lang="en-US">Number of warrants outstanding</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_WarrantsAndRightsOutstanding" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_WarrantsAndRightsOutstanding"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:label="loc_F4248H746F72_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xml:lang="en-US">Class of Warrant or Right, Exercise Price of Warrants or Rights</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xml:lang="en-US">Price per unit of warrants outstanding</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="lab_H6460J968H94_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtConversionOriginalDebtAmount1" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DebtConversionOriginalDebtAmount1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DebtConversionOriginalDebtAmount1" xml:lang="en-US">Conversion of unsecured convertible debentures to equity</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DebtConversionOriginalDebtAmount1" xml:lang="en-US">Conversion of unsecured convertible debentures to equity</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DebtConversionOriginalDebtAmount1" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DebtConversionOriginalDebtAmount1"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtConversionOriginalDebtInterestRateOfDebt" xlink:label="loc_F4248H746F72_us-gaap_DebtConversionOriginalDebtInterestRateOfDebt"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DebtConversionOriginalDebtInterestRateOfDebt" xml:lang="en-US">Debt Conversion, Original Debt, Interest Rate of Debt</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_DebtConversionOriginalDebtInterestRateOfDebt" xml:lang="en-US">Debt conversion interest rate</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_DebtConversionOriginalDebtInterestRateOfDebt" xlink:to="lab_H6460J968H94_us-gaap_DebtConversionOriginalDebtInterestRateOfDebt"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DebtInstrumentConvertibleConversionPrice1" xml:lang="en-US">Debt Instrument, Convertible, Conversion Price</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DebtInstrumentConvertibleConversionPrice1" xml:lang="en-US">Conversion price</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DebtInstrumentConvertibleConversionPrice1" xml:lang="en-US">Debt Instrument, Convertible, Conversion Price</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfWarrantOrRightOutstanding" xlink:label="loc_F4248H746F72_us-gaap_ClassOfWarrantOrRightOutstanding"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ClassOfWarrantOrRightOutstanding" xml:lang="en-US">Warrants outstanding, beginning of period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_ClassOfWarrantOrRightOutstanding" xml:lang="en-US">Warrants outstanding</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_H6460J968H94_us-gaap_ClassOfWarrantOrRightOutstanding" xml:lang="en-US">Warrants outstanding, beginning of period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_H6460J968H94_us-gaap_ClassOfWarrantOrRightOutstanding" xml:lang="en-US">Warrants outstanding, end of period</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ClassOfWarrantOrRightOutstanding" xlink:to="lab_H6460J968H94_us-gaap_ClassOfWarrantOrRightOutstanding"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xml:lang="en-US">Class of Warrant or Right, Number of Securities Called by Each Warrant or Right</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xml:lang="en-US">Number of securities called by each warrant</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ClassOfWarrantOrRightIssuedInPeriod" xlink:label="loc_F4248H746F72_sdev_ClassOfWarrantOrRightIssuedInPeriod"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ClassOfWarrantOrRightIssuedInPeriod" xml:lang="en-US">Class Of Warrant Or Right Issued In Period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_ClassOfWarrantOrRightIssuedInPeriod" xml:lang="en-US">Number of warrant issued</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ClassOfWarrantOrRightIssuedInPeriod" xml:lang="en-US">Number of preferred stock and warrants for common stock issued.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ClassOfWarrantOrRightIssuedInPeriod" xlink:to="lab_H6460J968H94_sdev_ClassOfWarrantOrRightIssuedInPeriod"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ClassOfWarrantOrRightGrantDateFairValue" xlink:label="loc_IF21F453I7K897H8F732_sdev_ClassOfWarrantOrRightGrantDateFairValue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantDateFairValue" xml:lang="en-US">Class Of Warrant Or Right Grant Date Fair Value</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantDateFairValue" xml:lang="en-US">Class of warrant or right grant date fair value</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantDateFairValue" xml:lang="en-US">Represent grant date fair value of warrants.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ClassOfWarrantOrRightGrantDateFairValue" xlink:to="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantDateFairValue"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="loc_F4248H746F72_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xml:lang="en-US">Risk free rate</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xml:lang="en-US">Risk free rate</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:to="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xml:lang="en-US">Expected dividends</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xml:lang="en-US">Expected dividends</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate" xlink:label="loc_F4248H746F72_sdev_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate" xml:lang="en-US">Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Forfeiture Rate</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate" xml:lang="en-US">Expected forfeiture rate</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate" xml:lang="en-US">Expected forfeiture rate</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate" xlink:to="lab_H6460J968H94_sdev_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xml:lang="en-US">Expected volatility</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xml:lang="en-US">Expected volatility</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_F4248H746F72_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xml:lang="en-US">Expected life</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xml:lang="en-US">Expected life</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xml:lang="en-US">Expected life</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:to="lab_H6460J968H94_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharePrice" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_SharePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SharePrice" xml:lang="en-US">Market price of the Company common stock on date of grant of options</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SharePrice" xml:lang="en-US">Market price of the Company common stock on date of grant of options</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_SharePrice" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_SharePrice"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:label="loc_F4248H746F72_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xml:lang="en-US">Expiry term</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:to="lab_H6460J968H94_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xml:lang="en-US">Unrecognized expense related to non-vested stock-based compensation arrangements granted</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_DonLevintinMember" xlink:label="loc_F4248H746F72_sdev_DonLevintinMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_DonLevintinMember" xml:lang="en-US">Don Levintin [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_DonLevintinMember" xml:lang="en-US">Don Levintin</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_DonLevintinMember" xlink:to="lab_H6460J968H94_sdev_DonLevintinMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ACorporationInWhichTheCfoHasAnOwnershipInterestMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_ACorporationInWhichTheCfoHasAnOwnershipInterestMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ACorporationInWhichTheCfoHasAnOwnershipInterestMember" xml:lang="en-US">A corporation in which the CFO has an ownership interest [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ACorporationInWhichTheCfoHasAnOwnershipInterestMember" xml:lang="en-US">A corporation in which the CFO has an ownership interest</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ACorporationInWhichTheCfoHasAnOwnershipInterestMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_ACorporationInWhichTheCfoHasAnOwnershipInterestMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChiefExecutiveOfficerMember" xlink:label="loc_F4248H746F72_us-gaap_ChiefExecutiveOfficerMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ChiefExecutiveOfficerMember" xml:lang="en-US">Chief Executive Officer [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ChiefExecutiveOfficerMember" xlink:to="lab_H6460J968H94_us-gaap_ChiefExecutiveOfficerMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_NortheastIndustrialPartnersLlcMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_NortheastIndustrialPartnersLlcMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_NortheastIndustrialPartnersLlcMember" xml:lang="en-US">Northeast Industrial Partners, LLC [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_NortheastIndustrialPartnersLlcMember" xml:lang="en-US">Northeast Industrial Partners, LLC</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_NortheastIndustrialPartnersLlcMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_NortheastIndustrialPartnersLlcMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ChiefTechnicalOfficerMember" xlink:label="loc_F4248H746F72_sdev_ChiefTechnicalOfficerMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ChiefTechnicalOfficerMember" xml:lang="en-US">Chief Technical Officer [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ChiefTechnicalOfficerMember" xml:lang="en-US">Chief Technical Officer</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ChiefTechnicalOfficerMember" xlink:to="lab_H6460J968H94_sdev_ChiefTechnicalOfficerMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_AndrBuysMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_AndrBuysMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_AndrBuysMember" xml:lang="en-US">Andr Buys [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_AndrBuysMember" xml:lang="en-US">Andre Buys [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_AndrBuysMember" xml:lang="en-US">Andre Buys</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_AndrBuysMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_AndrBuysMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ACorporationOwnedAndControlledByADirectorOfTheCompanyMember" xlink:label="loc_F4248H746F72_sdev_ACorporationOwnedAndControlledByADirectorOfTheCompanyMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ACorporationOwnedAndControlledByADirectorOfTheCompanyMember" xml:lang="en-US">A corporation owned and controlled by a director of the Company [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ACorporationOwnedAndControlledByADirectorOfTheCompanyMember" xml:lang="en-US">A corporation owned and controlled by a director of the Company</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ACorporationOwnedAndControlledByADirectorOfTheCompanyMember" xlink:to="lab_H6460J968H94_sdev_ACorporationOwnedAndControlledByADirectorOfTheCompanyMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChiefFinancialOfficerMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ChiefFinancialOfficerMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ChiefFinancialOfficerMember" xml:lang="en-US">Chief Financial Officer [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ChiefFinancialOfficerMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ChiefFinancialOfficerMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_TwoCorporationsInWhichTheCeoHasAnOwnershipInterestMember" xlink:label="loc_F4248H746F72_sdev_TwoCorporationsInWhichTheCeoHasAnOwnershipInterestMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_TwoCorporationsInWhichTheCeoHasAnOwnershipInterestMember" xml:lang="en-US">Two Corporations in which the CEO has an ownership interest [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_TwoCorporationsInWhichTheCeoHasAnOwnershipInterestMember" xml:lang="en-US">Two Corporations in which the CEO has an ownership interest</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_TwoCorporationsInWhichTheCeoHasAnOwnershipInterestMember" xlink:to="lab_H6460J968H94_sdev_TwoCorporationsInWhichTheCeoHasAnOwnershipInterestMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DirectorMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DirectorMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DirectorMember" xml:lang="en-US">Director [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DirectorMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DirectorMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_TwoExdirectorsMember" xlink:label="loc_F4248H746F72_sdev_TwoExdirectorsMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_TwoExdirectorsMember" xml:lang="en-US">Two Ex directors [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_TwoExdirectorsMember" xml:lang="en-US">Two Ex-Directors [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_TwoExdirectorsMember" xml:lang="en-US">Two Ex-Directors</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_TwoExdirectorsMember" xlink:to="lab_H6460J968H94_sdev_TwoExdirectorsMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_AutomobileAllowanceMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_AutomobileAllowanceMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_AutomobileAllowanceMember" xml:lang="en-US">Automobile allowance [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_AutomobileAllowanceMember" xml:lang="en-US">Automobile allowance</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_AutomobileAllowanceMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_AutomobileAllowanceMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ConsultingFeeToAnIndependentDirectorMember" xlink:label="loc_F4248H746F72_sdev_ConsultingFeeToAnIndependentDirectorMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ConsultingFeeToAnIndependentDirectorMember" xml:lang="en-US">Consulting fee to an independent director [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ConsultingFeeToAnIndependentDirectorMember" xml:lang="en-US">Consulting fee to an independent director</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ConsultingFeeToAnIndependentDirectorMember" xlink:to="lab_H6460J968H94_sdev_ConsultingFeeToAnIndependentDirectorMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ACorporationInWhichTheChiefOperatingOfficerHasAnOwnershipInterestMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_ACorporationInWhichTheChiefOperatingOfficerHasAnOwnershipInterestMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ACorporationInWhichTheChiefOperatingOfficerHasAnOwnershipInterestMember" xml:lang="en-US">A corporation in which the Chief Operating Officer has an ownership interest [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ACorporationInWhichTheChiefOperatingOfficerHasAnOwnershipInterestMember" xml:lang="en-US">A corporation in which the Chief Operating Officer has an ownership interest</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ACorporationInWhichTheChiefOperatingOfficerHasAnOwnershipInterestMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_ACorporationInWhichTheChiefOperatingOfficerHasAnOwnershipInterestMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent" xlink:label="loc_F4248H746F72_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent" xml:lang="en-US">Related parties payable</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent" xml:lang="en-US">Related parties payable</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent" xlink:to="lab_H6460J968H94_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_EmployeeBenefitsAndShareBasedCompensation"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_EmployeeBenefitsAndShareBasedCompensation" xml:lang="en-US">Employee Benefits and Share-based Compensation</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_EmployeeBenefitsAndShareBasedCompensation" xml:lang="en-US">Employee Benefits and Share-based Compensation</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_EmployeeBenefitsAndShareBasedCompensation"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_EmployeeBenefitsMonthlyCashPayment" xlink:label="loc_F4248H746F72_sdev_EmployeeBenefitsMonthlyCashPayment"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_EmployeeBenefitsMonthlyCashPayment" xml:lang="en-US">Employee Benefits Monthly Cash Payment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_EmployeeBenefitsMonthlyCashPayment" xml:lang="en-US">Employee Benefits, monthly cash payment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_EmployeeBenefitsMonthlyCashPayment" xml:lang="en-US">Employee Benefits, monthly cash payment</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_EmployeeBenefitsMonthlyCashPayment" xlink:to="lab_H6460J968H94_sdev_EmployeeBenefitsMonthlyCashPayment"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xml:lang="en-US">Related Party Transaction, Amounts of Transaction</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xml:lang="en-US">Related Party Transaction, Amounts of Transaction</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_F4248H746F72_us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DebtInstrumentInterestRateStatedPercentage" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_DebtInstrumentInterestRateStatedPercentage" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_DebtInstrumentInterestRateStatedPercentage" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="lab_H6460J968H94_us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_UnitsIssuedDuringPeriodPerUnitAmount" xlink:label="loc_IF21F453I7K897H8F732_sdev_UnitsIssuedDuringPeriodPerUnitAmount"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_UnitsIssuedDuringPeriodPerUnitAmount" xml:lang="en-US">Units Issued During Period Per Unit Amount</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_UnitsIssuedDuringPeriodPerUnitAmount" xml:lang="en-US">Units Issued During Period, Per Unit Amount</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_UnitsIssuedDuringPeriodPerUnitAmount" xml:lang="en-US">Units Issued During Period, Per Unit Amount</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_UnitsIssuedDuringPeriodPerUnitAmount" xlink:to="lab_KH43H675K9M019J0H954_sdev_UnitsIssuedDuringPeriodPerUnitAmount"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested" xlink:label="loc_F4248H746F72_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested" xlink:to="lab_H6460J968H94_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xml:lang="en-US">Stock Issued During Period, Shares, Issued for Services</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xml:lang="en-US">Stock Issued During Period, Shares, Issued for Services</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xml:lang="en-US">Number of common stock share issued</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveTerseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xml:lang="en-US">Number of common stock share issued</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:label="loc_F4248H746F72_us-gaap_StockIssuedDuringPeriodValueIssuedForServices"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xml:lang="en-US">Stock Issued During Period, Value, Issued for Services</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xml:lang="en-US">Stock Issued During Period, Value, Issued for Services</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xml:lang="en-US">Stock Issued During Period, Value, Issued for Services</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:to="lab_H6460J968H94_us-gaap_StockIssuedDuringPeriodValueIssuedForServices"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_RelatedPartyTransactionMonthlyAmountsOfTransaction" xlink:label="loc_IF21F453I7K897H8F732_sdev_RelatedPartyTransactionMonthlyAmountsOfTransaction"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_RelatedPartyTransactionMonthlyAmountsOfTransaction" xml:lang="en-US">Related Party Transaction Monthly Amounts Of Transaction</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_RelatedPartyTransactionMonthlyAmountsOfTransaction" xml:lang="en-US">Related Party Transaction, Monthly Amounts of Transaction</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_RelatedPartyTransactionMonthlyAmountsOfTransaction" xml:lang="en-US">Related Party Transaction, Monthly Amounts of Transaction</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_RelatedPartyTransactionMonthlyAmountsOfTransaction" xlink:to="lab_KH43H675K9M019J0H954_sdev_RelatedPartyTransactionMonthlyAmountsOfTransaction"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_RelatedPartyTransactionQuarterlyAmountsOfTransaction" xlink:label="loc_F4248H746F72_sdev_RelatedPartyTransactionQuarterlyAmountsOfTransaction"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_RelatedPartyTransactionQuarterlyAmountsOfTransaction" xml:lang="en-US">Related Party Transaction Quarterly Amounts Of Transaction</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_RelatedPartyTransactionQuarterlyAmountsOfTransaction" xml:lang="en-US">Related Party Transaction, Quarterly Amounts of Transaction</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_RelatedPartyTransactionQuarterlyAmountsOfTransaction" xml:lang="en-US">Related Party Transaction, Quarterly Amounts of Transaction</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_RelatedPartyTransactionQuarterlyAmountsOfTransaction" xlink:to="lab_H6460J968H94_sdev_RelatedPartyTransactionQuarterlyAmountsOfTransaction"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DueToRelatedPartiesCurrentAndNoncurrent" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent" xml:lang="en-US">Due to Related Parties</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent" xml:lang="en-US">Due to Related Parties</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToEmployees" xlink:label="loc_F4248H746F72_us-gaap_PaymentsToEmployees"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_PaymentsToEmployees" xml:lang="en-US">Payments to Employees</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_PaymentsToEmployees" xml:lang="en-US">Payments to Employees</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_PaymentsToEmployees" xlink:to="lab_H6460J968H94_us-gaap_PaymentsToEmployees"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_CashBalanceInCommonStock" xlink:label="loc_IF21F453I7K897H8F732_sdev_CashBalanceInCommonStock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_CashBalanceInCommonStock" xml:lang="en-US">Cash Balance In Common Stock</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_CashBalanceInCommonStock" xml:lang="en-US">Cash balance in common stock</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_CashBalanceInCommonStock" xml:lang="en-US">Amount of cash balance in common stock.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_CashBalanceInCommonStock" xlink:to="lab_KH43H675K9M019J0H954_sdev_CashBalanceInCommonStock"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_AmountOfAccrualIssuedForProportionateShares" xlink:label="loc_F4248H746F72_sdev_AmountOfAccrualIssuedForProportionateShares"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_AmountOfAccrualIssuedForProportionateShares" xml:lang="en-US">Amount Of Accrual Issued For Proportionate Shares</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_sdev_AmountOfAccrualIssuedForProportionateShares" xml:lang="en-US">Amount of accrual issued for proportionate shares</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_AmountOfAccrualIssuedForProportionateShares" xml:lang="en-US">Amount of accrual issued for proportionate shares.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_AmountOfAccrualIssuedForProportionateShares" xlink:to="lab_H6460J968H94_sdev_AmountOfAccrualIssuedForProportionateShares"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_RentExpensesForServices" xlink:label="loc_IF21F453I7K897H8F732_sdev_RentExpensesForServices"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_RentExpensesForServices" xml:lang="en-US">Rent Expenses For Services</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_RentExpensesForServices" xml:lang="en-US">Rental expenses for services</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_RentExpensesForServices" xml:lang="en-US">Rental expense for the reporting period for services.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_RentExpensesForServices" xlink:to="lab_KH43H675K9M019J0H954_sdev_RentExpensesForServices"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="loc_F4248H746F72_us-gaap_LeaseAndRentalExpense"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_LeaseAndRentalExpense" xml:lang="en-US">Operating Leases, Rent Expense</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_LeaseAndRentalExpense" xml:lang="en-US">Office rent</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_LeaseAndRentalExpense" xlink:to="lab_H6460J968H94_us-gaap_LeaseAndRentalExpense"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForRent" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_PaymentsForRent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PaymentsForRent" xml:lang="en-US">Payments for Rent</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PaymentsForRent" xml:lang="en-US">Payments for rent</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_PaymentsForRent" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_PaymentsForRent"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ConsultingAgreementsMember" xlink:label="loc_F4248H746F72_sdev_ConsultingAgreementsMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ConsultingAgreementsMember" xml:lang="en-US">Consulting Agreements [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ConsultingAgreementsMember" xml:lang="en-US">Represents information regarding consulting agreements.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ConsultingAgreementsMember" xlink:to="lab_H6460J968H94_sdev_ConsultingAgreementsMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PurchaseAndSaleAgreementTheAgreementWithAndreBuysMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_PurchaseAndSaleAgreementTheAgreementWithAndreBuysMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_PurchaseAndSaleAgreementTheAgreementWithAndreBuysMember" xml:lang="en-US">Purchase and Sale Agreement (the Agreement) with Andre Buys [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_PurchaseAndSaleAgreementTheAgreementWithAndreBuysMember" xml:lang="en-US">Purchase and Sale Agreement (the Agreement) with Andre Buys</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_PurchaseAndSaleAgreementTheAgreementWithAndreBuysMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_PurchaseAndSaleAgreementTheAgreementWithAndreBuysMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ConsultingAgreementWithGanzPursuantMember" xlink:label="loc_F4248H746F72_sdev_ConsultingAgreementWithGanzPursuantMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ConsultingAgreementWithGanzPursuantMember" xml:lang="en-US">Consulting Agreement With Ganz Pursuant [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ConsultingAgreementWithGanzPursuantMember" xml:lang="en-US">Represents information regarding consulting agreement with Ganz pursuant.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ConsultingAgreementWithGanzPursuantMember" xlink:to="lab_H6460J968H94_sdev_ConsultingAgreementWithGanzPursuantMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ConsultingAgreementWithConsultantPursuantMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_ConsultingAgreementWithConsultantPursuantMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ConsultingAgreementWithConsultantPursuantMember" xml:lang="en-US">Consulting Agreement With Consultant Pursuant [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ConsultingAgreementWithConsultantPursuantMember" xml:lang="en-US">Represents information regarding consulting agreement with a consultant pursuant.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ConsultingAgreementWithConsultantPursuantMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_ConsultingAgreementWithConsultantPursuantMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_EmploymentAgreementWithTheCEOMember" xlink:label="loc_F4248H746F72_sdev_EmploymentAgreementWithTheCEOMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_EmploymentAgreementWithTheCEOMember" xml:lang="en-US">Employment Agreement With The C E O [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_EmploymentAgreementWithTheCEOMember" xml:lang="en-US">Employment agreement with the CEO [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_EmploymentAgreementWithTheCEOMember" xml:lang="en-US">Employment agreement with the CEO</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_EmploymentAgreementWithTheCEOMember" xlink:to="lab_H6460J968H94_sdev_EmploymentAgreementWithTheCEOMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ACorporationOwnedByTheCeoAndLaterDesignatedExecutiveChairmanMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_ACorporationOwnedByTheCeoAndLaterDesignatedExecutiveChairmanMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ACorporationOwnedByTheCeoAndLaterDesignatedExecutiveChairmanMember" xml:lang="en-US">A Corporation owned by the CEO and later designated executive chairman [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ACorporationOwnedByTheCeoAndLaterDesignatedExecutiveChairmanMember" xml:lang="en-US">A Corporation owned by the CEO and later designated executive chairman</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ACorporationOwnedByTheCeoAndLaterDesignatedExecutiveChairmanMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_ACorporationOwnedByTheCeoAndLaterDesignatedExecutiveChairmanMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PresidentAndChiefOperatingOfficerMember" xlink:label="loc_F4248H746F72_sdev_PresidentAndChiefOperatingOfficerMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_PresidentAndChiefOperatingOfficerMember" xml:lang="en-US">President and Chief Operating Officer [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_PresidentAndChiefOperatingOfficerMember" xml:lang="en-US">President and Chief Operating Officer</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_PresidentAndChiefOperatingOfficerMember" xlink:to="lab_H6460J968H94_sdev_PresidentAndChiefOperatingOfficerMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ACorporationOwnedAndControlledByTheCfoMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_ACorporationOwnedAndControlledByTheCfoMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ACorporationOwnedAndControlledByTheCfoMember" xml:lang="en-US">A corporation owned and controlled by the CFO [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ACorporationOwnedAndControlledByTheCfoMember" xml:lang="en-US">A corporation owned and controlled by the CFO</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ACorporationOwnedAndControlledByTheCfoMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_ACorporationOwnedAndControlledByTheCfoMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ConsultingAgreementWithBryanGanzMember" xlink:label="loc_F4248H746F72_sdev_ConsultingAgreementWithBryanGanzMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ConsultingAgreementWithBryanGanzMember" xml:lang="en-US">Consulting Agreement with Bryan Ganz [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ConsultingAgreementWithBryanGanzMember" xml:lang="en-US">Consulting Agreement with Bryan Ganz</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ConsultingAgreementWithBryanGanzMember" xlink:to="lab_H6460J968H94_sdev_ConsultingAgreementWithBryanGanzMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_NewMexicoLimitedLiabilityCompanyMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_NewMexicoLimitedLiabilityCompanyMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_NewMexicoLimitedLiabilityCompanyMember" xml:lang="en-US">New Mexico limited liability company [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_NewMexicoLimitedLiabilityCompanyMember" xml:lang="en-US">New Mexico limited liability company</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_NewMexicoLimitedLiabilityCompanyMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_NewMexicoLimitedLiabilityCompanyMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_LeasingOfficePremisesInOakvilleOntarioCanadaMember" xlink:label="loc_F4248H746F72_sdev_LeasingOfficePremisesInOakvilleOntarioCanadaMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_LeasingOfficePremisesInOakvilleOntarioCanadaMember" xml:lang="en-US">Leasing office premises in Oakville, Ontario, Canada [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_LeasingOfficePremisesInOakvilleOntarioCanadaMember" xml:lang="en-US">Leasing office premises in Oakville, Ontario, Canada</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_LeasingOfficePremisesInOakvilleOntarioCanadaMember" xlink:to="lab_H6460J968H94_sdev_LeasingOfficePremisesInOakvilleOntarioCanadaMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_LeasingOfficePremisesInWakefieldMassachusettsUsaMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_LeasingOfficePremisesInWakefieldMassachusettsUsaMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_LeasingOfficePremisesInWakefieldMassachusettsUsaMember" xml:lang="en-US">Leasing office premises in Wakefield, Massachusetts, USA [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_LeasingOfficePremisesInWakefieldMassachusettsUsaMember" xml:lang="en-US">Leasing office premises in Wakefield, Massachusetts, USA</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_LeasingOfficePremisesInWakefieldMassachusettsUsaMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_LeasingOfficePremisesInWakefieldMassachusettsUsaMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_AnniversaryAxis" xlink:label="loc_F4248H746F72_sdev_AnniversaryAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_AnniversaryAxis" xml:lang="en-US">Anniversary [Axis]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_AnniversaryAxis" xml:lang="en-US">Information regarding anniversary.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_AnniversaryAxis" xlink:to="lab_H6460J968H94_sdev_AnniversaryAxis"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_AnniversaryDomain" xlink:label="loc_IF21F453I7K897H8F732_sdev_AnniversaryDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_AnniversaryDomain" xml:lang="en-US">Anniversary [Domain]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_AnniversaryDomain" xml:lang="en-US">Represents information regarding anniversary.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_AnniversaryDomain" xlink:to="lab_KH43H675K9M019J0H954_sdev_AnniversaryDomain"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_SecondAnniversaryMember" xlink:label="loc_F4248H746F72_sdev_SecondAnniversaryMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_SecondAnniversaryMember" xml:lang="en-US">Second Anniversary [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_SecondAnniversaryMember" xml:lang="en-US">Second Anniversary</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_SecondAnniversaryMember" xml:lang="en-US">Represents information regarding second anniversary.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_SecondAnniversaryMember" xlink:to="lab_H6460J968H94_sdev_SecondAnniversaryMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_SixthAnniversaryMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_SixthAnniversaryMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_SixthAnniversaryMember" xml:lang="en-US">Sixth Anniversary [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_SixthAnniversaryMember" xml:lang="en-US">Sixth Anniversary</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_SixthAnniversaryMember" xml:lang="en-US">Represents information regarding sixth anniversary.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_SixthAnniversaryMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_SixthAnniversaryMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_EighthAnniversaryMember" xlink:label="loc_F4248H746F72_sdev_EighthAnniversaryMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_EighthAnniversaryMember" xml:lang="en-US">Eighth Anniversary [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_EighthAnniversaryMember" xml:lang="en-US">Eighth Anniversary</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_EighthAnniversaryMember" xml:lang="en-US">Represents information regarding eighth anniversary.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_EighthAnniversaryMember" xlink:to="lab_H6460J968H94_sdev_EighthAnniversaryMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_SubsequentEventTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SubsequentEventTypeAxis" xml:lang="en-US">Subsequent Event Type [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_SubsequentEventTypeAxis" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_SubsequentEventTypeAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_F4248H746F72_us-gaap_SubsequentEventTypeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_SubsequentEventTypeDomain" xml:lang="en-US">Subsequent Event Type [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_SubsequentEventTypeDomain" xlink:to="lab_H6460J968H94_us-gaap_SubsequentEventTypeDomain"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_SubsequentEventMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SubsequentEventMember" xml:lang="en-US">Subsequent Event [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_SubsequentEventMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_SubsequentEventMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_F4248H746F72_srt_StatementGeographicalAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_srt_StatementGeographicalAxis" xml:lang="en-US">Geographical [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_srt_StatementGeographicalAxis" xlink:to="lab_H6460J968H94_srt_StatementGeographicalAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_IF21F453I7K897H8F732_srt_SegmentGeographicalDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_srt_SegmentGeographicalDomain" xml:lang="en-US">Geographical [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_srt_SegmentGeographicalDomain" xlink:to="lab_KH43H675K9M019J0H954_srt_SegmentGeographicalDomain"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_IN" xlink:label="loc_F4248H746F72_stpr_IN"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_stpr_IN" xml:lang="en-US">INDIANA</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_stpr_IN" xlink:to="lab_H6460J968H94_stpr_IN"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_MA" xlink:label="loc_IF21F453I7K897H8F732_stpr_MA"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_stpr_MA" xml:lang="en-US">MASSACHUSETTS</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_stpr_MA" xlink:to="lab_KH43H675K9M019J0H954_stpr_MA"/>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_ZA" xlink:label="loc_F4248H746F72_country_ZA"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_country_ZA" xml:lang="en-US">SOUTH AFRICA</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_country_ZA" xlink:to="lab_H6460J968H94_country_ZA"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_MonthlyCommitment" xlink:label="loc_IF21F453I7K897H8F732_sdev_MonthlyCommitment"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_MonthlyCommitment" xml:lang="en-US">Monthly Commitment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_MonthlyCommitment" xml:lang="en-US">Monthly commitment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_MonthlyCommitment" xml:lang="en-US">Monthly commitment</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_MonthlyCommitment" xlink:to="lab_KH43H675K9M019J0H954_sdev_MonthlyCommitment"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_QuarterlyCommitmentPaidInShares" xlink:label="loc_F4248H746F72_sdev_QuarterlyCommitmentPaidInShares"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_QuarterlyCommitmentPaidInShares" xml:lang="en-US">Quarterly Commitment Paid In Shares</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_QuarterlyCommitmentPaidInShares" xml:lang="en-US">Quarterly commitment, paid in shares</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_QuarterlyCommitmentPaidInShares" xml:lang="en-US">Quarterly commitment, paid in shares</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_QuarterlyCommitmentPaidInShares" xlink:to="lab_H6460J968H94_sdev_QuarterlyCommitmentPaidInShares"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_AnnualCommitment" xlink:label="loc_IF21F453I7K897H8F732_sdev_AnnualCommitment"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_AnnualCommitment" xml:lang="en-US">Annual Commitment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_AnnualCommitment" xml:lang="en-US">Annual commitment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_AnnualCommitment" xml:lang="en-US">Annual commitment</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_AnnualCommitment" xlink:to="lab_KH43H675K9M019J0H954_sdev_AnnualCommitment"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ContingentTerminationPayment" xlink:label="loc_F4248H746F72_sdev_ContingentTerminationPayment"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_ContingentTerminationPayment" xml:lang="en-US">Contingent Termination Payment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_ContingentTerminationPayment" xml:lang="en-US">Contingent termination payment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_ContingentTerminationPayment" xml:lang="en-US">Contingent termination payment</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_ContingentTerminationPayment" xlink:to="lab_H6460J968H94_sdev_ContingentTerminationPayment"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PaymentsForPurchaseAndSaleAgreement" xlink:label="loc_IF21F453I7K897H8F732_sdev_PaymentsForPurchaseAndSaleAgreement"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaymentsForPurchaseAndSaleAgreement" xml:lang="en-US">Payments For Purchase And Sale Agreement</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaymentsForPurchaseAndSaleAgreement" xml:lang="en-US">Payments for purchase and sale agreement</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaymentsForPurchaseAndSaleAgreement" xml:lang="en-US">Payments for purchase and sale agreement</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_PaymentsForPurchaseAndSaleAgreement" xlink:to="lab_KH43H675K9M019J0H954_sdev_PaymentsForPurchaseAndSaleAgreement"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermPurchaseCommitmentAmount" xlink:label="loc_F4248H746F72_us-gaap_LongTermPurchaseCommitmentAmount"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_LongTermPurchaseCommitmentAmount" xml:lang="en-US">Long-term Purchase Commitment, Amount</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_LongTermPurchaseCommitmentAmount" xml:lang="en-US">Long-term Purchase Commitment, Amount</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_LongTermPurchaseCommitmentAmount" xlink:to="lab_H6460J968H94_us-gaap_LongTermPurchaseCommitmentAmount"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_LongTermPurchaseCommitmentValueOfShares" xlink:label="loc_IF21F453I7K897H8F732_sdev_LongTermPurchaseCommitmentValueOfShares"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_LongTermPurchaseCommitmentValueOfShares" xml:lang="en-US">Long Term Purchase Commitment Value Of Shares</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_LongTermPurchaseCommitmentValueOfShares" xml:lang="en-US">Long-term Purchase Commitment, Value of Shares</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_LongTermPurchaseCommitmentValueOfShares" xml:lang="en-US">Long-term Purchase Commitment, Value of Shares</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_LongTermPurchaseCommitmentValueOfShares" xlink:to="lab_KH43H675K9M019J0H954_sdev_LongTermPurchaseCommitmentValueOfShares"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_DescriptionOfRoyalty" xlink:label="loc_F4248H746F72_sdev_DescriptionOfRoyalty"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_DescriptionOfRoyalty" xml:lang="en-US">Description Of Royalty</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_DescriptionOfRoyalty" xml:lang="en-US">Description of royalty</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_DescriptionOfRoyalty" xml:lang="en-US">Description of royalty</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_DescriptionOfRoyalty" xlink:to="lab_H6460J968H94_sdev_DescriptionOfRoyalty"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted" xml:lang="en-US">Purchase Commitment, Remaining Minimum Amount Committed</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted" xml:lang="en-US">Purchase Commitment, Remaining Minimum Amount Committed</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermPurchaseCommitmentPeriod" xlink:label="loc_F4248H746F72_us-gaap_LongtermPurchaseCommitmentPeriod"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_LongtermPurchaseCommitmentPeriod" xml:lang="en-US">Long-term Purchase Commitment, Period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_LongtermPurchaseCommitmentPeriod" xml:lang="en-US">Long-term Purchase Commitment, Period</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_LongtermPurchaseCommitmentPeriod" xlink:to="lab_H6460J968H94_us-gaap_LongtermPurchaseCommitmentPeriod"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PaymentsForSigningFees" xlink:label="loc_IF21F453I7K897H8F732_sdev_PaymentsForSigningFees"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaymentsForSigningFees" xml:lang="en-US">Payments For Signing Fees</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaymentsForSigningFees" xml:lang="en-US">Payments for signing fees</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaymentsForSigningFees" xml:lang="en-US">Payments for signing fees</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_PaymentsForSigningFees" xlink:to="lab_KH43H675K9M019J0H954_sdev_PaymentsForSigningFees"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_F4248H746F72_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xml:lang="en-US">Number of options outstanding, beginning of period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xml:lang="en-US">Number of stock options</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xml:lang="en-US">Number of options outstanding, beginning of period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xml:lang="en-US">Number of options outstanding, end of period</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="lab_H6460J968H94_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xml:lang="en-US">Stock option price per share</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xml:lang="en-US">Stock options outstanding at end of year, weighted average exercise price</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid" xlink:label="loc_F4248H746F72_us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Distribution Paid</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid" xml:lang="en-US">Amount for consideration portfolio</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid" xml:lang="en-US">First installment of consideration payment</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid" xlink:to="lab_H6460J968H94_us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount" xml:lang="en-US">Second installment of consideration payment in cash</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount" xml:lang="en-US">Agreed to pay amount for discretion</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_DeferredCompensationArrangementWithIndividualAwardGrantedAmount" xlink:label="loc_F4248H746F72_sdev_DeferredCompensationArrangementWithIndividualAwardGrantedAmount"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_DeferredCompensationArrangementWithIndividualAwardGrantedAmount" xml:lang="en-US">Deferred Compensation Arrangement With Individual Award Granted Amount</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_DeferredCompensationArrangementWithIndividualAwardGrantedAmount" xml:lang="en-US">Deferred compensation arrangement with individual share award granted amount</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_DeferredCompensationArrangementWithIndividualAwardGrantedAmount" xml:lang="en-US">Represents amount of deferred compensation arrangement with individual award granted amount.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_DeferredCompensationArrangementWithIndividualAwardGrantedAmount" xlink:to="lab_H6460J968H94_sdev_DeferredCompensationArrangementWithIndividualAwardGrantedAmount"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Maximum Contractual Term</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1" xml:lang="en-US">Terms of stock option grant date</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1" xlink:label="loc_F4248H746F72_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Requisite Service Period</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1" xml:lang="en-US">Stock option terms of remain employee</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1" xlink:to="lab_H6460J968H94_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PercentageOfRoyalty" xlink:label="loc_IF21F453I7K897H8F732_sdev_PercentageOfRoyalty"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_PercentageOfRoyalty" xml:lang="en-US">Percentage Of Royalty</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_PercentageOfRoyalty" xml:lang="en-US">Percentage of royalty</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_PercentageOfRoyalty" xml:lang="en-US">Represents percentage of royalty.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_PercentageOfRoyalty" xlink:to="lab_KH43H675K9M019J0H954_sdev_PercentageOfRoyalty"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PercentageOfIntellectualPropertyOfPortfolio" xlink:label="loc_F4248H746F72_sdev_PercentageOfIntellectualPropertyOfPortfolio"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_PercentageOfIntellectualPropertyOfPortfolio" xml:lang="en-US">Percentage Of Intellectual Property Of Portfolio</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_PercentageOfIntellectualPropertyOfPortfolio" xml:lang="en-US">Percentage of intellectual property of portfolio</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_PercentageOfIntellectualPropertyOfPortfolio" xml:lang="en-US">Represents percentage of intellectual property in the Portfolio.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_PercentageOfIntellectualPropertyOfPortfolio" xlink:to="lab_H6460J968H94_sdev_PercentageOfIntellectualPropertyOfPortfolio"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_AmountOfRoyaltyExceeds" xlink:label="loc_IF21F453I7K897H8F732_sdev_AmountOfRoyaltyExceeds"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_AmountOfRoyaltyExceeds" xml:lang="en-US">Amount Of Royalty Exceeds</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_AmountOfRoyaltyExceeds" xml:lang="en-US">Amount of royalty exceeds</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_AmountOfRoyaltyExceeds" xml:lang="en-US">Represents amount of royalty exceeds.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_AmountOfRoyaltyExceeds" xlink:to="lab_KH43H675K9M019J0H954_sdev_AmountOfRoyaltyExceeds"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RoyaltyExpense" xlink:label="loc_F4248H746F72_us-gaap_RoyaltyExpense"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_RoyaltyExpense" xml:lang="en-US">Royalty Expense</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_RoyaltyExpense" xml:lang="en-US">Minimum payment of royalty</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_RoyaltyExpense" xlink:to="lab_H6460J968H94_us-gaap_RoyaltyExpense"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_MinimalCommitmentRelatingToEmploymentContract" xlink:label="loc_IF21F453I7K897H8F732_sdev_MinimalCommitmentRelatingToEmploymentContract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_MinimalCommitmentRelatingToEmploymentContract" xml:lang="en-US">Minimal Commitment Relating To Employment Contract</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_MinimalCommitmentRelatingToEmploymentContract" xml:lang="en-US">Minimal commitment relating to employment contract</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_MinimalCommitmentRelatingToEmploymentContract" xml:lang="en-US">Represents amount of minimal commitment relating to the employment contract.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_MinimalCommitmentRelatingToEmploymentContract" xlink:to="lab_KH43H675K9M019J0H954_sdev_MinimalCommitmentRelatingToEmploymentContract"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_TermsOfMinimalCommitmentRelatingToEmploymentContract" xlink:label="loc_F4248H746F72_sdev_TermsOfMinimalCommitmentRelatingToEmploymentContract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_TermsOfMinimalCommitmentRelatingToEmploymentContract" xml:lang="en-US">Terms Of Minimal Commitment Relating To Employment Contract</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_TermsOfMinimalCommitmentRelatingToEmploymentContract" xml:lang="en-US">Terms of minimal commitment relating to employment contract</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_TermsOfMinimalCommitmentRelatingToEmploymentContract" xml:lang="en-US">Represent terms of commitment relating to the employment contract.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_TermsOfMinimalCommitmentRelatingToEmploymentContract" xlink:to="lab_H6460J968H94_sdev_TermsOfMinimalCommitmentRelatingToEmploymentContract"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_CommonStockFutureIssuanceShare" xlink:label="loc_IF21F453I7K897H8F732_sdev_CommonStockFutureIssuanceShare"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_CommonStockFutureIssuanceShare" xml:lang="en-US">Common Stock Future Issuance Share</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_CommonStockFutureIssuanceShare" xml:lang="en-US">Share will be issue on first quarter of 2019</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_CommonStockFutureIssuanceShare" xml:lang="en-US">Represents share will be issue on first quarter of 2019.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_CommonStockFutureIssuanceShare" xlink:to="lab_KH43H675K9M019J0H954_sdev_CommonStockFutureIssuanceShare"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_NumberOfConsultants" xlink:label="loc_F4248H746F72_sdev_NumberOfConsultants"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_NumberOfConsultants" xml:lang="en-US">Number Of Consultants</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_NumberOfConsultants" xml:lang="en-US">Number of consultants</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_NumberOfConsultants" xml:lang="en-US">Represents number of consultants.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_NumberOfConsultants" xlink:to="lab_H6460J968H94_sdev_NumberOfConsultants"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PaymentForConsultants" xlink:label="loc_IF21F453I7K897H8F732_sdev_PaymentForConsultants"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaymentForConsultants" xml:lang="en-US">Payment For Consultants</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_PaymentForConsultants" xml:lang="en-US">Represents amount of payment for consultants.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_PaymentForConsultants" xlink:to="lab_KH43H675K9M019J0H954_sdev_PaymentForConsultants"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_AmountOfIncreasedInPaymentForConsultants" xlink:label="loc_F4248H746F72_sdev_AmountOfIncreasedInPaymentForConsultants"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_AmountOfIncreasedInPaymentForConsultants" xml:lang="en-US">Amount Of Increased In Payment For Consultants</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_AmountOfIncreasedInPaymentForConsultants" xml:lang="en-US">Amount of increased in payment for consultants</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_AmountOfIncreasedInPaymentForConsultants" xml:lang="en-US">Amount of increased in payment for consultants.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_AmountOfIncreasedInPaymentForConsultants" xlink:to="lab_H6460J968H94_sdev_AmountOfIncreasedInPaymentForConsultants"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_IssuanceOfWarrantForConsultant" xlink:label="loc_IF21F453I7K897H8F732_sdev_IssuanceOfWarrantForConsultant"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_IssuanceOfWarrantForConsultant" xml:lang="en-US">Issuance Of Warrant For Consultant</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_IssuanceOfWarrantForConsultant" xml:lang="en-US">Issuance of warrant for consultant</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_IssuanceOfWarrantForConsultant" xml:lang="en-US">Represents amount of issuance of warrant for consultant.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_IssuanceOfWarrantForConsultant" xlink:to="lab_KH43H675K9M019J0H954_sdev_IssuanceOfWarrantForConsultant"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PercentageOfIssuanceOfWarrantVested" xlink:label="loc_F4248H746F72_sdev_PercentageOfIssuanceOfWarrantVested"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_PercentageOfIssuanceOfWarrantVested" xml:lang="en-US">Percentage Of Issuance Of Warrant Vested</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_PercentageOfIssuanceOfWarrantVested" xml:lang="en-US">Percentage of issuance of warrant vested</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_PercentageOfIssuanceOfWarrantVested" xml:lang="en-US">Represents percentage of warrant vested.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_PercentageOfIssuanceOfWarrantVested" xlink:to="lab_H6460J968H94_sdev_PercentageOfIssuanceOfWarrantVested"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ConcentrationRiskByTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ConcentrationRiskByTypeAxis" xml:lang="en-US">Concentration Risk Type [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ConcentrationRiskByTypeAxis" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ConcentrationRiskByTypeAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_F4248H746F72_us-gaap_ConcentrationRiskTypeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ConcentrationRiskTypeDomain" xml:lang="en-US">Concentration Risk Type [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ConcentrationRiskTypeDomain" xlink:to="lab_H6460J968H94_us-gaap_ConcentrationRiskTypeDomain"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsReceivableMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_AccountsReceivableMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AccountsReceivableMember" xml:lang="en-US">Accounts Receivable [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_AccountsReceivableMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_AccountsReceivableMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerMember" xlink:label="loc_F4248H746F72_us-gaap_RevenueFromContractWithCustomerMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_RevenueFromContractWithCustomerMember" xml:lang="en-US">Revenues [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_RevenueFromContractWithCustomerMember" xlink:to="lab_H6460J968H94_us-gaap_RevenueFromContractWithCustomerMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_VendorConcentrationMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_VendorConcentrationMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_VendorConcentrationMember" xml:lang="en-US">Vendor Concentration [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_VendorConcentrationMember" xml:lang="en-US">Vendor Concentration</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_VendorConcentrationMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_VendorConcentrationMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_BipMember" xlink:label="loc_F4248H746F72_sdev_BipMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_BipMember" xml:lang="en-US">Bip [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_BipMember" xml:lang="en-US">BIP manufacturer</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_BipMember" xml:lang="en-US">Represents BIP manufacturer member.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_BipMember" xlink:to="lab_H6460J968H94_sdev_BipMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_SafarilandLlcMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_SafarilandLlcMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_SafarilandLlcMember" xml:lang="en-US">Safariland Llc [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_SafarilandLlcMember" xml:lang="en-US">Safariland, LLC</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_SafarilandLlcMember" xml:lang="en-US">Safariland, LLC</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_SafarilandLlcMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_SafarilandLlcMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_TermOfAgreement" xlink:label="loc_F4248H746F72_sdev_TermOfAgreement"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_TermOfAgreement" xml:lang="en-US">Term Of Agreement</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_TermOfAgreement" xml:lang="en-US">Term of agreement</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_TermOfAgreement" xml:lang="en-US">It represents term of agreement.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_TermOfAgreement" xlink:to="lab_H6460J968H94_sdev_TermOfAgreement"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ExtensionForAdditionalTermOfAgreement" xlink:label="loc_IF21F453I7K897H8F732_sdev_ExtensionForAdditionalTermOfAgreement"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ExtensionForAdditionalTermOfAgreement" xml:lang="en-US">Extension For Additional Term Of Agreement</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_ExtensionForAdditionalTermOfAgreement" xml:lang="en-US">Additional term of agreement</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ExtensionForAdditionalTermOfAgreement" xml:lang="en-US">It represents additional term of agreement.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ExtensionForAdditionalTermOfAgreement" xlink:to="lab_KH43H675K9M019J0H954_sdev_ExtensionForAdditionalTermOfAgreement"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_SeriesBSecuredConvertibleDebenturesIssuedPursuantToIndentureInPaymentOfAccruedInterestMember" xlink:label="loc_F4248H746F72_sdev_SeriesBSecuredConvertibleDebenturesIssuedPursuantToIndentureInPaymentOfAccruedInterestMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_SeriesBSecuredConvertibleDebenturesIssuedPursuantToIndentureInPaymentOfAccruedInterestMember" xml:lang="en-US">Series BSecured Convertible Debentures Issued Pursuant To Indenture In Payment Of Accrued Interest Member</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_SeriesBSecuredConvertibleDebenturesIssuedPursuantToIndentureInPaymentOfAccruedInterestMember" xml:lang="en-US">Series B Secured Convertible Debentures issued pursuant to the Indenture in payment of accrued interest</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_SeriesBSecuredConvertibleDebenturesIssuedPursuantToIndentureInPaymentOfAccruedInterestMember" xlink:to="lab_H6460J968H94_sdev_SeriesBSecuredConvertibleDebenturesIssuedPursuantToIndentureInPaymentOfAccruedInterestMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecuredDebtMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_SecuredDebtMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SecuredDebtMember" xml:lang="en-US">Secured convertible debentures [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_SecuredDebtMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_SecuredDebtMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_F4248H746F72_srt_RangeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_srt_RangeAxis" xml:lang="en-US">Range [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_srt_RangeAxis" xlink:to="lab_H6460J968H94_srt_RangeAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_IF21F453I7K897H8F732_srt_RangeMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_srt_RangeMember" xml:lang="en-US">Range [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_srt_RangeMember" xlink:to="lab_KH43H675K9M019J0H954_srt_RangeMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_F4248H746F72_srt_MinimumMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_srt_MinimumMember" xml:lang="en-US">Minimum [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_srt_MinimumMember" xml:lang="en-US">Minimum</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_srt_MinimumMember" xlink:to="lab_H6460J968H94_srt_MinimumMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_IF21F453I7K897H8F732_srt_MaximumMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_srt_MaximumMember" xml:lang="en-US">Maximum [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_srt_MaximumMember" xml:lang="en-US">Maximum</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_srt_MaximumMember" xlink:to="lab_KH43H675K9M019J0H954_srt_MaximumMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_TrustIndentureAgreementMember" xlink:label="loc_F4248H746F72_sdev_TrustIndentureAgreementMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_TrustIndentureAgreementMember" xml:lang="en-US">Trust Indenture Agreement [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_TrustIndentureAgreementMember" xml:lang="en-US">Represent the trust indenture agreement.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_TrustIndentureAgreementMember" xlink:to="lab_H6460J968H94_sdev_TrustIndentureAgreementMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConvertibleDebtCurrent" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ConvertibleDebtCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebtCurrent" xml:lang="en-US">Unsecured convertible debentures</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebtCurrent" xml:lang="en-US">Unsecured convertible debentures</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebtCurrent" xml:lang="en-US">Unsecured convertible debentures</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ConvertibleDebtCurrent" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebtCurrent"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromConvertibleDebt" xlink:label="loc_F4248H746F72_us-gaap_ProceedsFromConvertibleDebt"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ProceedsFromConvertibleDebt" xml:lang="en-US">Proceeds from Convertible Debt</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_ProceedsFromConvertibleDebt" xml:lang="en-US">Proceeds</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_ProceedsFromConvertibleDebt" xml:lang="en-US">Proceeds from Convertible Debt</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ProceedsFromConvertibleDebt" xlink:to="lab_H6460J968H94_us-gaap_ProceedsFromConvertibleDebt"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_DebtInstrumentsExchangedForSubordinateSecuredDebentures" xlink:label="loc_IF21F453I7K897H8F732_sdev_DebtInstrumentsExchangedForSubordinateSecuredDebentures"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_DebtInstrumentsExchangedForSubordinateSecuredDebentures" xml:lang="en-US">Debt Instruments Exchanged For Subordinate Secured Debentures</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_DebtInstrumentsExchangedForSubordinateSecuredDebentures" xml:lang="en-US">Debt instruments exchanged for Subordinate Secured Debentures</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_DebtInstrumentsExchangedForSubordinateSecuredDebentures" xml:lang="en-US">Debt instruments exchanged for Subordinate Secured Debentures</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_DebtInstrumentsExchangedForSubordinateSecuredDebentures" xlink:to="lab_KH43H675K9M019J0H954_sdev_DebtInstrumentsExchangedForSubordinateSecuredDebentures"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfConvertibleDebt" xlink:label="loc_F4248H746F72_us-gaap_RepaymentsOfConvertibleDebt"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_RepaymentsOfConvertibleDebt" xml:lang="en-US">Repayment of convertible debentures</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_RepaymentsOfConvertibleDebt" xml:lang="en-US">Repayment of unsecured convertible debentures</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_RepaymentsOfConvertibleDebt" xml:lang="en-US">Repayments of Convertible Debt</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_H6460J968H94_us-gaap_RepaymentsOfConvertibleDebt" xml:lang="en-US">Repayment of convertible debentures</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_RepaymentsOfConvertibleDebt" xlink:to="lab_H6460J968H94_us-gaap_RepaymentsOfConvertibleDebt"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_RepaymentsOfAccruedInterest" xlink:label="loc_IF21F453I7K897H8F732_sdev_RepaymentsOfAccruedInterest"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_RepaymentsOfAccruedInterest" xml:lang="en-US">Repayments Of Accrued Interest</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_RepaymentsOfAccruedInterest" xml:lang="en-US">Repayments of accrued interest</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_RepaymentsOfAccruedInterest" xml:lang="en-US">Repayments of accrued interest</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_RepaymentsOfAccruedInterest" xlink:to="lab_KH43H675K9M019J0H954_sdev_RepaymentsOfAccruedInterest"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_AccuredInterestFromBeforeDateOfSettlementRepaid" xlink:label="loc_F4248H746F72_sdev_AccuredInterestFromBeforeDateOfSettlementRepaid"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_AccuredInterestFromBeforeDateOfSettlementRepaid" xml:lang="en-US">Accured Interest From Before Date Of Settlement Repaid</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_AccuredInterestFromBeforeDateOfSettlementRepaid" xml:lang="en-US">Accured interest from before date of settlement repaid</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_AccuredInterestFromBeforeDateOfSettlementRepaid" xml:lang="en-US">Accured interest from before date of settlement repaid</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_AccuredInterestFromBeforeDateOfSettlementRepaid" xlink:to="lab_H6460J968H94_sdev_AccuredInterestFromBeforeDateOfSettlementRepaid"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_AccruedInterestFromAfterDateOfSettlementRepaid" xlink:label="loc_IF21F453I7K897H8F732_sdev_AccruedInterestFromAfterDateOfSettlementRepaid"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_AccruedInterestFromAfterDateOfSettlementRepaid" xml:lang="en-US">Accrued Interest From After Date Of Settlement Repaid</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_AccruedInterestFromAfterDateOfSettlementRepaid" xml:lang="en-US">Accrued interest from after date of settlement repaid</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_AccruedInterestFromAfterDateOfSettlementRepaid" xml:lang="en-US">Accrued interest from after date of settlement repaid</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_AccruedInterestFromAfterDateOfSettlementRepaid" xlink:to="lab_KH43H675K9M019J0H954_sdev_AccruedInterestFromAfterDateOfSettlementRepaid"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtConversionConvertedInstrumentAmount1" xlink:label="loc_F4248H746F72_us-gaap_DebtConversionConvertedInstrumentAmount1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DebtConversionConvertedInstrumentAmount1" xml:lang="en-US">Debt Conversion, Converted Instrument, Amount</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_DebtConversionConvertedInstrumentAmount1" xml:lang="en-US">Debt Conversion, Converted Instrument, Amount</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_DebtConversionConvertedInstrumentAmount1" xlink:to="lab_H6460J968H94_us-gaap_DebtConversionConvertedInstrumentAmount1"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_DebtConversionConvertedInstrumentAmountOfAccruedInterestConverted" xlink:label="loc_IF21F453I7K897H8F732_sdev_DebtConversionConvertedInstrumentAmountOfAccruedInterestConverted"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_DebtConversionConvertedInstrumentAmountOfAccruedInterestConverted" xml:lang="en-US">Debt Conversion Converted Instrument Amount Of Accrued Interest Converted</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_DebtConversionConvertedInstrumentAmountOfAccruedInterestConverted" xml:lang="en-US">Debt Conversion, Converted Instrument, Amount of accrued interest converted</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_DebtConversionConvertedInstrumentAmountOfAccruedInterestConverted" xml:lang="en-US">Debt Conversion, Converted Instrument, Amount of accrued interest converted</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_DebtConversionConvertedInstrumentAmountOfAccruedInterestConverted" xlink:to="lab_KH43H675K9M019J0H954_sdev_DebtConversionConvertedInstrumentAmountOfAccruedInterestConverted"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpenseDebt" xlink:label="loc_F4248H746F72_us-gaap_InterestExpenseDebt"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_InterestExpenseDebt" xml:lang="en-US">Interest Expense, Debt</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_InterestExpenseDebt" xml:lang="en-US">Interest Expense, Debt</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_InterestExpenseDebt" xlink:to="lab_H6460J968H94_us-gaap_InterestExpenseDebt"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConvertibleDebt" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ConvertibleDebt"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebt" xml:lang="en-US">Convertible Debt</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebt" xml:lang="en-US">Convertible Debt</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebt" xml:lang="en-US">Convertible notes</label>
<label xlink:type="resource" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebt" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xml:lang="en-US">Convertible notes</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ConvertibleDebt" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ConvertibleDebt"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtConversionDescription" xlink:label="loc_F4248H746F72_us-gaap_DebtConversionDescription"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DebtConversionDescription" xml:lang="en-US">Debt Conversion, Description</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_DebtConversionDescription" xml:lang="en-US">Debt Conversion, Description</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_DebtConversionDescription" xlink:to="lab_H6460J968H94_us-gaap_DebtConversionDescription"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_ClassOfWarrantOrRightGrantsInPeriodExercisePrice" xlink:label="loc_IF21F453I7K897H8F732_sdev_ClassOfWarrantOrRightGrantsInPeriodExercisePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodExercisePrice" xml:lang="en-US">Class Of Warrant Or Right Grants In Period Exercise Price</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodExercisePrice" xml:lang="en-US">Class of Warrant or Right, Grants in Period, Exercise Price</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodExercisePrice" xml:lang="en-US">Class of Warrant or Right, Grants in Period, Exercise Price</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_ClassOfWarrantOrRightGrantsInPeriodExercisePrice" xlink:to="lab_KH43H675K9M019J0H954_sdev_ClassOfWarrantOrRightGrantsInPeriodExercisePrice"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_F4248H746F72_us-gaap_PaymentsOfDebtIssuanceCosts"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_PaymentsOfDebtIssuanceCosts" xml:lang="en-US">Financing fees incurred</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:to="lab_H6460J968H94_us-gaap_PaymentsOfDebtIssuanceCosts"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xml:lang="en-US">Amortization of debt discounts (premiums)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xml:lang="en-US">Amortization of debt discounts (premiums)</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentUnamortizedPremium" xlink:label="loc_F4248H746F72_us-gaap_DebtInstrumentUnamortizedPremium"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DebtInstrumentUnamortizedPremium" xml:lang="en-US">Deferred financing costs (DebtInstrumentUnamortizedPremium)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_DebtInstrumentUnamortizedPremium" xml:lang="en-US">Financing fees</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_H6460J968H94_us-gaap_DebtInstrumentUnamortizedPremium" xml:lang="en-US">Deferred financing costs</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_DebtInstrumentUnamortizedPremium" xlink:to="lab_H6460J968H94_us-gaap_DebtInstrumentUnamortizedPremium"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_InventoryAxis" xlink:label="loc_IF21F453I7K897H8F732_sdev_InventoryAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_InventoryAxis" xml:lang="en-US">Inventory [Axis]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_InventoryAxis" xml:lang="en-US">Inventory</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_InventoryAxis" xlink:to="lab_KH43H675K9M019J0H954_sdev_InventoryAxis"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_InventoryDomain" xlink:label="loc_F4248H746F72_sdev_InventoryDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_InventoryDomain" xml:lang="en-US">Inventory [Domain]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_InventoryDomain" xml:lang="en-US">Inventory</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_InventoryDomain" xlink:to="lab_H6460J968H94_sdev_InventoryDomain"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_RawMaterialsForByrnaMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_RawMaterialsForByrnaMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_RawMaterialsForByrnaMember" xml:lang="en-US">Raw Materials For Byrna [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_RawMaterialsForByrnaMember" xml:lang="en-US">Raw materials for Byrna [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_RawMaterialsForByrnaMember" xml:lang="en-US">This member stands for raw materials for Byrna.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_RawMaterialsForByrnaMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_RawMaterialsForByrnaMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_FinishedGoodsOfFourZerommBluntImpactProjectilesMember" xlink:label="loc_F4248H746F72_sdev_FinishedGoodsOfFourZerommBluntImpactProjectilesMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_FinishedGoodsOfFourZerommBluntImpactProjectilesMember" xml:lang="en-US">Finished Goods Of Four Zeromm Blunt Impact Projectiles [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_FinishedGoodsOfFourZerommBluntImpactProjectilesMember" xml:lang="en-US">Finished goods of 40mm Blunt Impact Projectiles [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_FinishedGoodsOfFourZerommBluntImpactProjectilesMember" xml:lang="en-US">Finished goods of 40mm Blunt Impact Projectiles</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_FinishedGoodsOfFourZerommBluntImpactProjectilesMember" xlink:to="lab_H6460J968H94_sdev_FinishedGoodsOfFourZerommBluntImpactProjectilesMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_FinishedGoodsOfFourZerommLmtLaunchersMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_FinishedGoodsOfFourZerommLmtLaunchersMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_FinishedGoodsOfFourZerommLmtLaunchersMember" xml:lang="en-US">Finished Goods Of Four Zeromm Lmt Launchers [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_FinishedGoodsOfFourZerommLmtLaunchersMember" xml:lang="en-US">Finished goods of 40mm LMT launchers [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_FinishedGoodsOfFourZerommLmtLaunchersMember" xml:lang="en-US">Finished goods of 40mm LMT launchers</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_FinishedGoodsOfFourZerommLmtLaunchersMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_FinishedGoodsOfFourZerommLmtLaunchersMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_InventoryProcuredFromOtherSuppliersMember" xlink:label="loc_F4248H746F72_sdev_InventoryProcuredFromOtherSuppliersMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_InventoryProcuredFromOtherSuppliersMember" xml:lang="en-US">Inventory procured from other suppliers [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_InventoryProcuredFromOtherSuppliersMember" xml:lang="en-US">Inventory procured from other suppliers</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_InventoryProcuredFromOtherSuppliersMember" xlink:to="lab_H6460J968H94_sdev_InventoryProcuredFromOtherSuppliersMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_NumberOfReportingSegment" xlink:label="loc_IF21F453I7K897H8F732_sdev_NumberOfReportingSegment"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_NumberOfReportingSegment" xml:lang="en-US">Number Of Reporting Segment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_NumberOfReportingSegment" xml:lang="en-US">Number of reporting segment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_NumberOfReportingSegment" xml:lang="en-US">Represent number of reporting segment.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_NumberOfReportingSegment" xlink:to="lab_KH43H675K9M019J0H954_sdev_NumberOfReportingSegment"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_F4248H746F72_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xml:lang="en-US">Finite-Lived Intangible Assets by Major Class [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="lab_H6460J968H94_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xml:lang="en-US">Finite-Lived Intangible Assets, Major Class Name [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PurchaseAndSaleAgreementWithAndreBuysMember" xlink:label="loc_F4248H746F72_sdev_PurchaseAndSaleAgreementWithAndreBuysMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_PurchaseAndSaleAgreementWithAndreBuysMember" xml:lang="en-US">Purchase and Sale Agreement with Andre Buys [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_PurchaseAndSaleAgreementWithAndreBuysMember" xml:lang="en-US">Purchase and sale agreement with andre buys</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_PurchaseAndSaleAgreementWithAndreBuysMember" xml:lang="en-US">Purchase and Sale Agreement with Andre Buys</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_PurchaseAndSaleAgreementWithAndreBuysMember" xlink:to="lab_H6460J968H94_sdev_PurchaseAndSaleAgreementWithAndreBuysMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_LegalCostsToTransferPatentsMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_LegalCostsToTransferPatentsMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_LegalCostsToTransferPatentsMember" xml:lang="en-US">Legal costs to transfer patents [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_LegalCostsToTransferPatentsMember" xml:lang="en-US">Legal costs to transfer patents</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_LegalCostsToTransferPatentsMember" xml:lang="en-US">Legal costs to transfer patents</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_LegalCostsToTransferPatentsMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_LegalCostsToTransferPatentsMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="loc_F4248H746F72_us-gaap_PaymentsToAcquireIntangibleAssets"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_PaymentsToAcquireIntangibleAssets" xml:lang="en-US">Purchase of patents</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_PaymentsToAcquireIntangibleAssets" xml:lang="en-US">Purchase of patents</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_H6460J968H94_us-gaap_PaymentsToAcquireIntangibleAssets" xml:lang="en-US">Purchase of patents</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_PaymentsToAcquireIntangibleAssets" xlink:to="lab_H6460J968H94_us-gaap_PaymentsToAcquireIntangibleAssets"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_FiniteLivedIntangibleAssetUsefulLife" xml:lang="en-US">Useful life of patents</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_FiniteLivedIntangibleAssetUsefulLife" xml:lang="en-US">Useful life of patents</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_LegalCostsToTransferOfPatentRights" xlink:label="loc_F4248H746F72_sdev_LegalCostsToTransferOfPatentRights"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_LegalCostsToTransferOfPatentRights" xml:lang="en-US">Legal Costs To Transfer Of Patent Rights</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_sdev_LegalCostsToTransferOfPatentRights" xml:lang="en-US">Legal costs to transfer of patent rights</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_LegalCostsToTransferOfPatentRights" xml:lang="en-US">Information about legal costs to transfer these patent rights.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_LegalCostsToTransferOfPatentRights" xlink:to="lab_H6460J968H94_sdev_LegalCostsToTransferOfPatentRights"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_TermForSecondPayment" xlink:label="loc_IF21F453I7K897H8F732_sdev_TermForSecondPayment"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_TermForSecondPayment" xml:lang="en-US">Term For Second Payment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_TermForSecondPayment" xml:lang="en-US">Term for second payment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_TermForSecondPayment" xml:lang="en-US">Information about term for making second payment.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_TermForSecondPayment" xlink:to="lab_KH43H675K9M019J0H954_sdev_TermForSecondPayment"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_PrepaymentOfPrepaidExpensesAndOtherReceivables" xlink:label="loc_F4248H746F72_sdev_PrepaymentOfPrepaidExpensesAndOtherReceivables"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_PrepaymentOfPrepaidExpensesAndOtherReceivables" xml:lang="en-US">Prepayment Of Prepaid Expenses And Other Receivables</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_sdev_PrepaymentOfPrepaidExpensesAndOtherReceivables" xml:lang="en-US">Prepayment of prepaid expenses and other receivables</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_PrepaymentOfPrepaidExpensesAndOtherReceivables" xml:lang="en-US">It represents prepayment of Prepaid expenses and other receivables.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_PrepaymentOfPrepaidExpensesAndOtherReceivables" xlink:to="lab_H6460J968H94_sdev_PrepaymentOfPrepaidExpensesAndOtherReceivables"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_WagerMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_WagerMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_WagerMember" xml:lang="en-US">Wager [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_WagerMember" xml:lang="en-US">Wager</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_WagerMember" xml:lang="en-US">Represents wager member.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_WagerMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_WagerMember"/>





<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_IF21F453I7K897H8F732_country_US"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_country_US" xml:lang="en-US">USA [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_country_US" xlink:to="lab_KH43H675K9M019J0H954_country_US"/>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_CA" xlink:label="loc_F4248H746F72_country_CA"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_country_CA" xml:lang="en-US">Canada [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_country_CA" xlink:to="lab_H6460J968H94_country_CA"/>









<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PropertyPlantAndEquipmentByTypeAxis" xml:lang="en-US">Property, Plant and Equipment by Type [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_F4248H746F72_us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_PropertyPlantAndEquipmentTypeDomain" xml:lang="en-US">Property, Plant and Equipment, Type [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="lab_H6460J968H94_us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComputerEquipmentMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_ComputerEquipmentMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ComputerEquipmentMember" xml:lang="en-US">Computer equipment [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_ComputerEquipmentMember" xml:lang="en-US">Computer Equipment and software</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_ComputerEquipmentMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_ComputerEquipmentMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_F4248H746F72_us-gaap_FurnitureAndFixturesMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_FurnitureAndFixturesMember" xml:lang="en-US">Furniture and fixtures [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_FurnitureAndFixturesMember" xml:lang="en-US">Furniture and Fixtures</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_FurnitureAndFixturesMember" xlink:to="lab_H6460J968H94_us-gaap_FurnitureAndFixturesMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_LeaseholdImprovementsMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_LeaseholdImprovementsMember" xml:lang="en-US">Leasehold Improvements [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_LeaseholdImprovementsMember" xml:lang="en-US">Leasehold Improvements</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_LeaseholdImprovementsMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_LeaseholdImprovementsMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_MouldsMember" xlink:label="loc_F4248H746F72_sdev_MouldsMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_MouldsMember" xml:lang="en-US">Moulds [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_MouldsMember" xml:lang="en-US">Moulds</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_MouldsMember" xml:lang="en-US">Moulds</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_MouldsMember" xlink:to="lab_H6460J968H94_sdev_MouldsMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDepreciationMethods" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_PropertyPlantAndEquipmentDepreciationMethods"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PropertyPlantAndEquipmentDepreciationMethods" xml:lang="en-US">Depreciation rate</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PropertyPlantAndEquipmentDepreciationMethods" xml:lang="en-US">Depreciation rate</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_PropertyPlantAndEquipmentDepreciationMethods" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_PropertyPlantAndEquipmentDepreciationMethods"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_F4248H746F72_us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_PropertyPlantAndEquipmentUsefulLife" xml:lang="en-US">Property, Plant and Equipment, Useful Life</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_PropertyPlantAndEquipmentUsefulLife" xml:lang="en-US">Property, Plant and Equipment, Useful Life</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:to="lab_H6460J968H94_us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_PropertyPlantAndEquipmentGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PropertyPlantAndEquipmentGross" xml:lang="en-US">Property, Plant and Equipment, Gross</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_PropertyPlantAndEquipmentGross" xml:lang="en-US">Property, Plant and Equipment, Gross</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_PropertyPlantAndEquipmentGross" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_PropertyPlantAndEquipmentGross"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_F4248H746F72_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xml:lang="en-US">Accumulated Depreciation</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xml:lang="en-US">Accumulated Depreciation</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="lab_H6460J968H94_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_MarketPriceOfTheCompanySCommonStockOnDateOfExtension" xlink:label="loc_IF21F453I7K897H8F732_sdev_MarketPriceOfTheCompanySCommonStockOnDateOfExtension"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_MarketPriceOfTheCompanySCommonStockOnDateOfExtension" xml:lang="en-US">Market Price Of The Company S Common Stock On Date Of Extension</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_MarketPriceOfTheCompanySCommonStockOnDateOfExtension" xml:lang="en-US">Market price of the Company common stock on date of grant of options</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_MarketPriceOfTheCompanySCommonStockOnDateOfExtension" xml:lang="en-US">Market price of the Company common stock on date of grant of options</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_MarketPriceOfTheCompanySCommonStockOnDateOfExtension" xlink:to="lab_KH43H675K9M019J0H954_sdev_MarketPriceOfTheCompanySCommonStockOnDateOfExtension"/>




















































































































































































































<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DebtInstrumentFaceAmount"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DebtInstrumentFaceAmount" xml:lang="en-US">Secured Convertible Notes</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DebtInstrumentFaceAmount" xml:lang="en-US">Secured convertible cotes</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DebtInstrumentFaceAmount" xml:lang="en-US">Secured Convertible Notes</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DebtInstrumentFaceAmount" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DebtInstrumentFaceAmount"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature" xlink:label="loc_F4248H746F72_us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature" xml:lang="en-US">Embedded conversion feature</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature" xml:lang="en-US">Embedded conversion feature</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature" xml:lang="en-US">Issuances</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="lab_H6460J968H94_us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature" xml:lang="en-US">Embedded derivative</label>
<label xlink:type="resource" xlink:label="lab_H6460J968H94_us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xml:lang="en-US">Embedded derivative</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature" xlink:to="lab_H6460J968H94_us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecuredDebt" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_SecuredDebt"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SecuredDebt" xml:lang="en-US">Carrying value</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SecuredDebt" xml:lang="en-US">Carrying value</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_SecuredDebt" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_SecuredDebt"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_DerivativeLiabilityConvertiblePromissoryNotes" xlink:label="loc_F4248H746F72_sdev_DerivativeLiabilityConvertiblePromissoryNotes"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_DerivativeLiabilityConvertiblePromissoryNotes" xml:lang="en-US">Derivative Liability Convertible Promissory Notes</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_sdev_DerivativeLiabilityConvertiblePromissoryNotes" xml:lang="en-US">Derivative liability-convertible promissory notes</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_DerivativeLiabilityConvertiblePromissoryNotes" xml:lang="en-US">Derivative liability convertible promissory notes.</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_DerivativeLiabilityConvertiblePromissoryNotes" xlink:to="lab_H6460J968H94_sdev_DerivativeLiabilityConvertiblePromissoryNotes"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_StockIssuedDuringPeriodValueStockWarrantsExercised" xlink:label="loc_IF21F453I7K897H8F732_sdev_StockIssuedDuringPeriodValueStockWarrantsExercised"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockIssuedDuringPeriodValueStockWarrantsExercised" xml:lang="en-US">Stock Issued During Period Value Stock Warrants Exercised</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockIssuedDuringPeriodValueStockWarrantsExercised" xml:lang="en-US">Exercise of warrants</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockIssuedDuringPeriodValueStockWarrantsExercised" xml:lang="en-US">Additional paid in capital (equity warrants)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_StockIssuedDuringPeriodValueStockWarrantsExercised" xml:lang="en-US">Exercise of warrants</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_StockIssuedDuringPeriodValueStockWarrantsExercised" xlink:to="lab_KH43H675K9M019J0H954_sdev_StockIssuedDuringPeriodValueStockWarrantsExercised"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_F4248H746F72_us-gaap_DerivativeInstrumentRiskAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DerivativeInstrumentRiskAxis" xml:lang="en-US">Derivative Instrument [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_DerivativeInstrumentRiskAxis" xlink:to="lab_H6460J968H94_us-gaap_DerivativeInstrumentRiskAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DerivativeContractTypeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DerivativeContractTypeDomain" xml:lang="en-US">Derivative Contract [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DerivativeContractTypeDomain" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DerivativeContractTypeDomain"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_IndexedSharesMember" xlink:label="loc_F4248H746F72_sdev_IndexedSharesMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_sdev_IndexedSharesMember" xml:lang="en-US">Indexed Shares [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_H6460J968H94_sdev_IndexedSharesMember" xml:lang="en-US">Indexed Shares</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_sdev_IndexedSharesMember" xlink:to="lab_H6460J968H94_sdev_IndexedSharesMember"/>
<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_FairValueMember" xlink:label="loc_IF21F453I7K897H8F732_sdev_FairValueMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_sdev_FairValueMember" xml:lang="en-US">Fair Value [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_KH43H675K9M019J0H954_sdev_FairValueMember" xml:lang="en-US">Fair Value</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_sdev_FairValueMember" xlink:to="lab_KH43H675K9M019J0H954_sdev_FairValueMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability" xlink:label="loc_F4248H746F72_us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability" xml:lang="en-US">Embedded derivatives, liability</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability" xml:lang="en-US">Embedded derivatives, liability</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability" xlink:to="lab_H6460J968H94_us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability"/>





<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeRemainingMaturity1" xlink:label="loc_F4248H746F72_us-gaap_DerivativeRemainingMaturity1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_DerivativeRemainingMaturity1" xml:lang="en-US">Remaining term (years)</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_DerivativeRemainingMaturity1" xml:lang="en-US">Remaining term (years)</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_DerivativeRemainingMaturity1" xlink:to="lab_H6460J968H94_us-gaap_DerivativeRemainingMaturity1"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLiabilityMeasurementInput" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_DerivativeLiabilityMeasurementInput"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DerivativeLiabilityMeasurementInput" xml:lang="en-US">Measurement Input</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_DerivativeLiabilityMeasurementInput" xml:lang="en-US">Risk free rate</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_DerivativeLiabilityMeasurementInput" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_DerivativeLiabilityMeasurementInput"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_F4248H746F72_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="lab_H6460J968H94_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_IF21F453I7K897H8F732_srt_ProductOrServiceAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_srt_ProductOrServiceAxis" xml:lang="en-US">Product and Service [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_srt_ProductOrServiceAxis" xlink:to="lab_KH43H675K9M019J0H954_srt_ProductOrServiceAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_F4248H746F72_srt_ProductsAndServicesDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_srt_ProductsAndServicesDomain" xml:lang="en-US">Product and Service [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_srt_ProductsAndServicesDomain" xlink:to="lab_H6460J968H94_srt_ProductsAndServicesDomain"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SalesRevenueSegmentMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_SalesRevenueSegmentMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SalesRevenueSegmentMember" xml:lang="en-US">Sales Gross [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SalesRevenueSegmentMember" xml:lang="en-US">Sales</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_SalesRevenueSegmentMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_SalesRevenueSegmentMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_F4248H746F72_srt_ConsolidationItemsAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_srt_ConsolidationItemsAxis" xml:lang="en-US">Consolidation Items [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_srt_ConsolidationItemsAxis" xlink:to="lab_H6460J968H94_srt_ConsolidationItemsAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_IF21F453I7K897H8F732_srt_ConsolidationItemsDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_srt_ConsolidationItemsDomain" xml:lang="en-US">Consolidation Items [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_srt_ConsolidationItemsDomain" xlink:to="lab_KH43H675K9M019J0H954_srt_ConsolidationItemsDomain"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_F4248H746F72_us-gaap_OperatingSegmentsMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_OperatingSegmentsMember" xml:lang="en-US">Operating Segments [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_H6460J968H94_us-gaap_OperatingSegmentsMember" xml:lang="en-US">Operating segment</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_OperatingSegmentsMember" xml:lang="en-US">Operating segment</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_OperatingSegmentsMember" xlink:to="lab_H6460J968H94_us-gaap_OperatingSegmentsMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IntersegmentEliminationMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_IntersegmentEliminationMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_IntersegmentEliminationMember" xml:lang="en-US">Intersegment Eliminations [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_IntersegmentEliminationMember" xml:lang="en-US">Elimination of intersegment revenue</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_IntersegmentEliminationMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_IntersegmentEliminationMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionAxis" xlink:label="loc_F4248H746F72_us-gaap_GeographicDistributionAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_GeographicDistributionAxis" xml:lang="en-US">Geographic Distribution [Axis]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_GeographicDistributionAxis" xlink:to="lab_H6460J968H94_us-gaap_GeographicDistributionAxis"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionDomesticMember" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_GeographicDistributionDomesticMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_GeographicDistributionDomesticMember" xml:lang="en-US">Geographic Distribution, Domestic [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_GeographicDistributionDomesticMember" xml:lang="en-US">SDI USA [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_GeographicDistributionDomesticMember" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_GeographicDistributionDomesticMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionForeignMember" xlink:label="loc_F4248H746F72_us-gaap_GeographicDistributionForeignMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_H6460J968H94_us-gaap_GeographicDistributionForeignMember" xml:lang="en-US">Geographic Distribution, Foreign [Member]</label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_H6460J968H94_us-gaap_GeographicDistributionForeignMember" xml:lang="en-US">SDI Canada [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_F4248H746F72_us-gaap_GeographicDistributionForeignMember" xlink:to="lab_H6460J968H94_us-gaap_GeographicDistributionForeignMember"/>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_IF21F453I7K897H8F732_us-gaap_SegmentReportingInformationLineItems"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_KH43H675K9M019J0H954_us-gaap_SegmentReportingInformationLineItems" xml:lang="en-US">Segment Reporting Information [Line Items]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_IF21F453I7K897H8F732_us-gaap_SegmentReportingInformationLineItems" xlink:to="lab_KH43H675K9M019J0H954_us-gaap_SegmentReportingInformationLineItems"/>


























<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionDomain" xlink:label="loc_us-gaap_GeographicDistributionDomain"/>
<label xlink:type="resource" xlink:label="lab_us-gaap_GeographicDistributionDomain" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Geographic Distribution [Domain]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeographicDistributionDomain" xlink:to="lab_us-gaap_GeographicDistributionDomain"/>




<loc xlink:type="locator" xlink:href="sdev-20190228.xsd#sdev_SaleRevenueMember" xlink:label="loc_sdev_SaleRevenueMember"/>
<label xlink:type="resource" xlink:label="lab_sdev_SaleRevenueMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Sale Revenue [Member]</label>
<label xlink:type="resource" xlink:label="lab_sdev_SaleRevenueMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xml:lang="en-US">TThis member stands for sales revenue.</label>
<label xlink:type="resource" xlink:label="lab_sdev_SaleRevenueMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Sales [Member]</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sdev_SaleRevenueMember" xlink:to="lab_sdev_SaleRevenueMember"/>



<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConvertibleNotesPayable" xlink:label="loc_us-gaap_ConvertibleNotesPayable"/>
<label xlink:type="resource" xlink:label="lab_us-gaap_ConvertibleNotesPayable" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Convertible Notes Payable</label>
<label xlink:type="resource" xlink:label="lab_us-gaap_ConvertibleNotesPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">Convertible notes</label>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConvertibleNotesPayable" xlink:to="lab_us-gaap_ConvertibleNotesPayable"/>
</labelLink></linkbase>
