1、7Pin Plug Socket: Connect the 7pin plug on the vehicle to the 7pin socket on the caravan or trailer to convert signal lights and power. 2、Wide Application: European car standard 7pin trailer connector, suitable for commercial vehicles, caravans, trailers, RVs, cars, trucks, etc. 3、Copper Contacts: Trailer socket plug extension cable adopts pure copper contacts, which has good conductivity, anti rust and stable performance. 4、Plastic Shell: Made of environmentally friendly ABS material, waterproof, wearproof, flame retardant, not easy to damage, and reliable in use. 5、Easy Use: Under normal working conditions, the line can be extended up to 2 meters. Fits all trailer plugs. Easy to install and easy to use.