1. Trailer Plug and Socket: 12V 3pin trailer plug and socket, designed to establish a stable signal transmission connection between vehicles and trailers, caravans, etc. Ideal for trailer hitches or replacing damaged sockets on existing vehicles. 2. European Standard: Certified with European CE and RoHS standards, compatible with the European wiring system for trailers, trucks, caravans, RVs, etc. Provides connections for turn signals, side lights, brake lights, and fog lights. 3. Waterproof Design: Features a 3pin waterproof plug with a silicone rubber seal and thermoplastic housing to prevent rust and corrosion, ensuring longlasting durability. 4. Easy Installation: Plugandplay design. Simply connect the plug and socket according to the wiring configuration, insert the plug into the socket, and lock it in place.