Features: 1.Wide Application: This trailer wire adapter plug supplies power to the trailer lights. Connect the trailer plug and the vehicle socket to turn on the tail lights, brake lights, and turn lights 2.Brass Terminals: This trailer wiring connector plug features brass terminals for excellent electrical conductivity. Durable ABS housing is not easy to damage. 3.7 Pin to 4 Pin: This trailer adapter plug is suitable for most trailers, cars and vehicles with 7 pin European round plug to 4 pin American flat socket. 4.Easy Installation: This round to flat trailer adapter adopts plug and play design, easy to install, time saving and effort saving. 5.Secure Connection: This 7 pin to 4 pin trailer adapter provides secure and reliable connection, easy to use. Specification: Item Type: Trailer Wire Adapter Plug Material: ABS, Brass Conversion Type: 7 Pin European to 4 Pin American Application: Trailer, Towing Truck, RV PackageList: 1 x Trailer Wire Adapter Plug