Shenzhen Tongzhou Testing Co., Ltd. (abbreviated as STT), established in 2015, is an independent third-party comprehensive testing laboratory specializing in electromagnetic compatibility (EMC), safety, radio‑frequency (RF), energy efficiency testing, and more. Located in Haomai High-Tech Park, Longhua District, Shenzhen, the facility spans approximately 2,000 square meters.

Since its inception, the company has strictly adhered to the ISO/IEC 17025 management system to ensure rigorous laboratory operations. Leveraging a talented technical team and state-of-the-art equipment, Tongzhou Testing has obtained accreditations from CNAS (China), A2LA/FCC (U.S.), IC (Canada), and other global authorities.Testing Fields: EMC, Safety, RF, energy efficiency, etc. Key Product Categories: Household appliances, IT, telecommunications, lighting, toys, short-range wireless devices, and more. We support more than 70 certification schemes covering more than 50 countries and regions, including CCC, SRRC, NCC, CE, FCC, MIC, CB, MET, E-Mark, ensuring seamless market access for clients’ products worldwide.