Shenzhen Tongzhou Testing Co., Ltd. (abbreviated as STT), established in 2015, it is an independent third-party comprehensive testing laboratory located in Haomai High-tech Park, Longhua District, Shenzhen, with a construction area of about 2000 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), CMA (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. Supports over 70 certifications across 50+ countries/regions, including CCC, SRRC, NCC, CE, FCC, MIC, CB, MET, E-Mark, ensuring seamless market access for clients’ products worldwide.