The United States has become China's second largest trading partner for several years in a row, and the Sino-US trade volume is on the rise year by year, so exports to the United States cannot be underestimated.

According to the provisions of the relevant part of the United States Federal Communications Regulations (CFR 47 part), all electronic products entering the United States need to be electromagnetic compatibility Certification (except for some products specifically specified in the relevant provisions), among which there are three common certification methods: Certification: (Products with radio transmitters must be FCC certificate-protected) Infrared transmitters are out of control; DoC: (Common products include IT products, microwave ovens, energy-saving lamps, rectifiers, etc.) ; "Verification" : Common products include audio and video products. . The certification methods and procedures of these three products are quite different, and the certification methods available for different products have relevant provisions in the FCC. The degree of rigor of its certification is decreasing. For these three certifications, the FCC Commission also has relevant requirements for each laboratory.