This electrical converter is designed to adapt a 4-pin vehicle plug to a 7-pin European plug. A dust cover is included on the 7-pin Euro trailer side to keep the connector clean when not in use. The plug-and-play design reduces the need for additional wiring or adapters inside the vehicle. It allows connection between 4-way American flat connectors on trailers and European 7-way trailer wiring systems. The converter separates the "stop" signal from American vehicles that use a 2-wire system. Installation guide: a) Before connecting the converter to the vehicle, ensure all vehicle signals are turned off. b) Connect one end of the converter to the existing 4-way US flat connector on the vehicle. c) Insert the 7-pin EU trailer plug into the converter. d) Verify that all connections are secure. e) No maintenance is required during use. Color: Black Material: Plastic Package Contents: 1 x Trailer light converter Note: Other items shown are not included. Note: Lighting and display settings may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.