1. Wide Application: This trailer wire adapter plug supplies power to the trailer lights. Connect the trailer plug and the vehicle socket to operate tail lights, brake lights, and turn signals 2. Brass Terminals: This trailer wiring connector plug features brass terminals for excellent electrical conductivity. ABS housing is durable and impact resistant 3. 7 Pin to 4 Pin: This trailer adapter plug is designed to convert a 7-pin European round plug to a 4-pin American flat socket, compatible with most trailers, cars, and towing vehicles 4. Easy Installation: This round to flat trailer adapter features a plug-and-play design for simple setup, saving time and effort 5. Secure Connection: This 7 pin to 4 pin trailer adapter ensures a reliable and stable electrical connection for safe operation Item Type: Trailer Wire Adapter Plug Conversion Type: 7 Pin European to 4 Pin American Application: Trailer, Towing Vehicle, RV Color: Black Material: ABS + Copper Package Contents: 1 x Trailer Wire Adapter Plug Note: Lighting and monitor settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm