Production Certification Picture Certification Name Certified By Business Scope Available Date --- Expired Date Verified CE MOST Audio Vedio Connector, For example: RCA, XLR, SPEAKON, 1/4" connector 2017-06-22 ~ Verified Test Report SIT Wall speaker 2018-07-24 ~ Research & Development There is/are 5 - 10 People R&D Engineer(s) in the company.