This electrical converter changes a US-style 4-way flat plug to a European-style 13-pin connector. Plug-and-play design minimizes the need for additional wiring installation; no other adapters required. Includes a dust cover on the European 13-pin trailer plug side to keep the connector clean when not in use. Converter separates the "stop" signal from the two-wire system commonly found in US vehicles. Wiring adapter connects a US 4-way vehicle connector to a European 13-way trailer wiring system. Instructions: 1. 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 (such as boat trailers, bike carriers, and others). It provides an electrical solution for connecting a US vehicle with a 4-way flat connector to a European trailer with a 13-pin round connector. 2. 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 should be used. 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's socket. d) Ensure all connections are securely fastened. e) No maintenance is required during normal use. Color: Black Material: Polyester Package Contents: 1 x Trailer Light Converter Note: Only the items listed above are included. Other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.