Usage Tips:This electric converter allows you to change a US style 7 vehicle adapter to a European 13 pin plug. Plug and play design, minimize the hassle of installing wiring inside, no other adapters required. Includes dust cover in the Euro trailer side with 13-pin plug to keep your plug clean when not in use. Converter with the function of separating the "stop" signal from the two wire system US vehicles. Wiring 7- US flat connectors on trailers with 13- European trailer wiring. Installation Guide: a) connecting the Converter to the vehicle, check all signals on the car have been turned off. b) Connect the Converter to the existing US 7 RV blade socket in the vehicle. c) Insert the other side EU trailer plug into the socket Converter. d) Check all connections are safety fastened. e) When exploitation, maintenance of the electrical adapter is not required. colour:Black Material:ABS Contents: 1 x Trailer Light Converter Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is 1-3cm.