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 connection clean when not in use. The plug-and-play design helps minimize the need for additional wiring or adapters inside the vehicle. It allows connection of 4-way American flat connectors on trailers to European 7-way trailer wiring systems. The converter features the ability to separate the "stop" signal from American vehicles with a 2-wire system. Installation guide: a) Before connecting the converter to the vehicle, ensure all vehicle signals are turned off. b) Connect one side 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: Lighting and different display settings may cause slight variations in the color of the item shown in the image compared to the actual product. Measurement error allowance is +/- 1-3 cm.