Japan's mandatory safety certification, proving that electronic and electrical products have passed the safety standard tests of Japan's Electrical Appliance and Material Safety Law or international IEC standards. 116 types of Class A products use a diamond-shaped mark, and 340 types of Class B products use a circular mark. Class A: wires and cables, fuses, wiring devices (electrical accessories, lighting equipment, etc.), current limiters, transformers, ballasts; electric heating appliances, electric power application machinery and appliances (household appliances), electronic application machinery and appliances (high-frequency depilators); other AC electrical machinery and appliances (electric insect killers, DC power devices), portable engines. Class B: simple wiring conduits and junction boxes, simple single-phase motors between 100V-300V, household electric heating products, household electric or electronic products, civilian or household products using light sources, household and commercial electronic products, other electrical products between 100V-300V.