Japan's DENTORL Law (Electrical Devices and Materials Control Law) stipulates that 506 kinds of products entering the Japanese market must pass safety certification. Among them, 165 kinds of A-type products should obtain diamond-shaped PSE marks, and 341 kinds of B-type products should obtain round PSE marks. PSE diamond certification: Among them, there are 165 kinds of products that are likely to cause electric shock, fire and other accidents, and are more dangerous, classified as "specific electrical products - called Class A electrical products", such as chargers, adapters, etc.; PSE circular certification: The remaining 341 less harmful products are classified as "non-specific electrical products - known as Class B electrical products", most of the large and small household appliances, lighting products, lithium batteries, etc.