Feature 1This electrical converter aims converting an American style 4way vehicle plug to a 7pin European adapter. 2Designed for separating "stop" signal from the twowire system US vehicle to to connect your european trailer. 3Ideal electrical solution for towing US vehicle with 4 way flat and European trailer with a 7-way round pin. 4Plugandplay installation without new wiring indoors, no other splice or cut required. 5The dust cover in the european trailer 7pin plug side can keep it clean when not in use.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. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Trailer ConnectorNoteIf 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.