This electrical converter allows to change a US style 4-way flat plug to a European style 13-pin connect Plug play design, minimize the hassle of installing any new wiring inside, no other adapters needed Included a dust cover in the EURO trailer 13-pin plug side to keep your plug clean when not in use Converter with the function of separating "stop" signal from the two-wire system US vehicles Wiring US 4-way vehicle connect to trailer with European 13-way trailer wiring Instruction: 1. This Trailer Light Converter made is designed f separating "stop" signal from the Two-Wire System US Vehicle to connect your European Trailer (, boat trailer, bike carriers others). It provides a electrial solution that if you have a US vehicle with 4 way flat, you to hooks up a European trailer, with a 13-way Round Pin. 2. If your US vehicle has the 4-Pole flat connect, your European trailer has the 13 pin round plug, where your US car need to separate the stop tail signals, this Trailer Wiring Adapter will need to be use. Installation Guide: a) 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 connect 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. col:Black Material:polyester Package Contents: 1 x Trailer light converter Only the above package content, other products are not included. Note: Light reflection different displays may cause the col of the item in the a little different from the real thing. The measurement allowed err is 1-3cm.