Features: 1.Change the US 4?pin flat plug to EU 13?pin connector. Connect the US 4?pin vehicle connector to the EU 13?pin trailer. 2.The converter has the function of separating the "stop" signal from the two?wire American vehicle. 3.Plug and play, minimizing the hassle of installing wiring inside, no other adapters are required. 4.Designed with a dust cover on the 13?pin plug side, which can keep the plug clean when not in use. 5.Lightweight and portable, easy to carry. Conform to strict quality control standards, dependable to use. Specification: Item Type: Trailer Connector Material: Plastic Instruction: 1. This fantastic Trailer Light Converter made is designed for separating "stop" signal from the Two-Wire System US Vehicle to connect your European Trailer (caravan, boat trailer, bike carriers and others). It provides a electrial solution that if you have a US vehicle with 4 way flat, and you want to hooks up a European trailer, with a 13-way Round Pin. 2. If your US vehicle has the 4-Pole flat connector, and your European trailer has the 13 pin round plug, where your US car need to separate the stop and tail signals, this Trailer Wiring Adapter will need to be use. Installation Guide: 1. Before connecting the Converter to the vehicle, check that all signals on the car have been turned off. 2. Connect the Converter to the existing US 4 way connector in the vehicle. 3. Insert the other side EU trailer plug into the socket Converter. 4. Check that all connections are safety fastened. 5. When exploitation, maintenance of the electrical adapter is not required. PackageList: 1 x Trailer Connector Note: Please check your vehicle and trailer to confirm if it meets the application of the converter before purchasing.