You should be asking what RoHS certification is, right? RoHS is the certification of the Directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment.
RoHS is a mandatory standard legislated by the European Union, and its full name is the Directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (Restriction of Hazardous Substances). The standard was formally implemented on July 1, 2006, and is mainly used to regulate the material and process standards of electrical and electronic products, making them more conducive to human health and environmental protection.
The standard aims to eliminate lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDE) (Note: the correct Chinese name for PBDE refers to polybrominated diphenyl ethers (PBDEs), PBDEs are a misnomer)*** 6 substances in electrical and electronic products, with a focus on cadmium, which should not be more than 0.01%.
RoHS Applicable Products
1, large household appliances: refrigerators, washing machines, microwave ovens, air conditioners and so on.
2, small household appliances: vacuum cleaners, irons, hairdryers, ovens, clocks and watches.
3, IT and communication instruments: computers, fax machines, telephones, cell phones and so on.
4, civil installations: radios, televisions, video recorders, musical instruments and so on.
5, lighting apparatus: in addition to home lighting, such as fluorescent lamps, lighting control devices.
6, power tools: drills, lathes, welding, sprayers and so on.
7, toys/entertainment, sports equipment: electric cars, TV game machines, automatic gambling machines, etc.
8, medical equipment: radiation therapy instrument, ECG tester, analyzing instrument, etc.
9, monitoring/control devices: smoke detectors, thermostats, factory monitoring and control machines, etc..
10, vending machines.
11, semiconductor devices.
Reference to the above: Baidu Encyclopedia-RoHS