1. It is necessary to see whether the product logo is complete, whether it has the manufacturer's trademark, and whether it has the safety certification mark of the local country (for example, in the Chinese market, whether it must have the CCC mark). If there is no mark on the plug and wire product, then this plug The product must be a fake and inferior product, and the quality of the product will not be guaranteed.

2. Check the certificate of conformity for plug products and the inspection report issued by the statutory department. If the converter product is not included in the compulsory certification, you should check the inspection report issued by the statutory inspection agency when purchasing, or check whether the file number on the plug is valid on the Internet.

3. Carry out a simple insertion experiment on the plug products. After the plug is inserted into the socket, the contact should be good, there is no loose feeling, and it can be pulled out without too much force, because although some products have been tested at the factory, it is inevitable that they will be transported after leaving the factory. It will damage the plug and insert, and test it before purchasing to reduce a lot of unnecessary losses in the future.

4. Never buy a plug with a rotatable pin or artificially change the shape of the plug. This kind of plug after changing the shape must pass the CCC certification, otherwise it is definitely an unsafe plug product, which is easily broken down by high-voltage electricity, and do not use it in Use two high-power electrical appliances on one socket at the same time; when it is found that the temperature of the plug socket or power cord is too high or sparks occur, stop using and replace it.