Exhibit 99.1

Addendum to May 15, 2013 Distributorship Agreement with Digi-Key Corporation

Portions of this exhibit have been redacted and the redacted portions have been separately filed with the Securities and Exchange Commission along with an Application for Confidential Treatment Pursuant to Rule 24b-2 of the Exchange Act. Confidential treatment for the redacted portions of this document have been requested pursuant to protection as "confidential" under Exemption 4 of the Freedom of Information Act, 5 U.S.C. § 552(b)(4).