Fakar Connector,Automotive Rf Connectors,Fakra Antenna Connector,Automotive Electronic Connectors Shenzhen huaxunde Technology CO.,Ltd. , https://www.huaxundekj.comFirst, look at the specific model of the product. When unpacking, be sure to carefully check whether the model on the ticket at the time of purchase matches the model of the door-to-door product. When it is completely correct, you can unpack it. Second, look at the appearance. Look at the details of the appearance of the product, such as scratches, etc., if it is a refrigerator, washing machine