This electrical converter allows you to change a US-style 4-way flat plug to a European-style 13-pin connector. The plug-and-play design minimizes the hassle of installing new wiring and requires no additional adapters. Includes a dust cover on the European trailer 13-pin plug side to keep the connector clean when not in use. The converter separates the "stop" signal from the two-wire system commonly found in US vehicles. This trailer light converter is designed to separate the "stop" signal from the two-wire system in US vehicles to connect to a European trailer with a 13-pin round plug. It provides an electrical solution for connecting a US vehicle with a 4-way flat connector to a European trailer (such as boat trailers, bike carriers, and others) that uses a 13-way round pin configuration. If your US vehicle has a 4-pole flat connector and your European trailer has a 13-pin round plug, and your vehicle requires separation of stop and tail signals, this trailer wiring adapter is necessary. Installation Guide: a) Connect the converter to the vehicle only after ensuring all vehicle signals are turned off. b) Connect the converter to the existing US 4-way connector on the vehicle. c) Insert the European trailer plug into the converter socket. d) Ensure all connections are securely fastened. e) No maintenance is required during use. Color: Black Material: Polyester Package Contents: 1 x Trailer Light Converter Note: Light reflection and differences in display screens may cause slight variations in color compared to the actual item. Measurement may vary by +/- 1-3 cm.