Electrical converter allows you to exchange a 4-pin vehicle socket for a 7-pin European socket. A dust cover is included on the side of the 7-pin Euro trailer to keep the socket clean when not in use. Plug-and-play minimizes the need for new wiring inside without the need for additional adapters. Wiring of 4-way American flat connectors on trailers with 7-way European trailer wiring. Converter with function to separate the "stop" signal from American vehicles with a 2-wire system Installation Guide: a) Before connecting the inverter to the vehicle, check that all vehicle signals are turned off. B) Connect one side of the converter to the vehicle's existing 4-way American flat connector. c) Insert the other EU trailer plug into the socket converter. d) Check that all connections are secure. e) No maintenance of the power adapter is required during use. Color: Black Material: Plastic Package Contents: 1x Trailer Light Converter Only the above package content, other products are not