This electrical converter allows you to change a US-style 4-way flat plug to a European-style 13-pin connector. Plug and play design minimizes the hassle of installing new wiring; no additional adapters required. Includes a dust cover on the European trailer 13-pin plug side to keep the connector clean when not in use. Converter features the ability to separate the "stop" signal from the two-wire system used in US vehicles. Enables connection of a US 4-way vehicle connector to a trailer with European 13-way wiring. 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 plug. 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 is necessary. Installation Guide: a) Before connecting the converter, ensure 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) Once installed, no maintenance or further adjustments are required. Color: Black Material: Polyester Package Contents: 1 x Trailer Light Converter Note: Only the items listed above are included. Light reflection and differences in display screens may cause slight variations in color compared to the actual item. Measurement error allowance is +/- 1-3 cm.