Feature:1. This electrical converter aims converting an American style 4way vehicle plug to a 7pin European adapter.2. Designed for separating "stop" signal from the twowire system US vehicle to to connect your european trailer.3. Ideal electrical solution for towing US vehicle with 4 way flat and European trailer with a 7-way round pin.4. Plugandplay installation without new wiring indoors, no other splice or cut required.5. The dust cover in the european trailer 7pin plug side can keep it clean when not in use.Specification:Item Type: Trailer ConnectorMaterial: PlasticLength: Approx. 17.7inUsage: Designed for separating "stop" signal from the Two-Wire System US Vehicle to connect your European Trailer (caravan, boat trailer, bike carriers and others).How to Use:a) Before connecting the Converter to the vehicle, check that all signals on the car have been turned off.b) Connect the Converter to the existing US 4 way connector in the vehicle.c) Insert the other side EU trailer plug into the socket Converter.d) Check that all connections are safety fastened.e) When exploitation, maintenance of the electrical adapter is not required..Package List:1 x Trailer ConnectorNote:If your US vehicle has the 4‑Pole flat connector, and your European trailer has the 7 pin round plug, where your US car need to separate the stop and tail signals, this Trailer Wiring Adapter will need to be use.