2. cqc is the National Quality Certification Center, safety refers to the 3C
3. ROHS is the European Union electrical and electronic products in the detection of hazardous special. Metal detection of lead, cadmium, mercury and hexavalent chromium. Non-metal to test six,
4. UL is the U.S. safety certification, the price of about 200,000, it is recommended that you do the FCC, less than 10,000, can be sold on sale,