7 Pin to 4/5 Pin Trailer Adapter:This 7 Pin Round to 4/5 Pin Trailer Adapter design to connect and transmit electrical signals between the tractor and the towed vehicle. It combines 4 way plug and 5 way plug, 2 in 1 design. Converts the 7-way trailer connector on the vehicle to a 4-way or 5-way connector to match the trailer, so you can use this for anything from your wiring harnesses on your towing vehicles or boat trailers. | Reliable Connection: Sturdy, heavy duty, solid and ready to go. Come with dust cover protect terminal from dust and water. Constructed with dust-free and high-impact glass-filled nylon available for used at any outdoor conditions. | Multiple Use: Combines 4 way plug with 5 way plug, and can be used by most trailers, allowing for versatile towing options. Design eliminates the need for cutting or splicing, hassle free setup, easy to install and remove. 7 pin to 4/5 pin trailer adapter features two handles on either side of the plug for a better grip when plugging in or unplugging trailer wiring. | Application: The 7 round to 4/5 pin trailer adapter easily synchronizing the trailer's signal and tail lights without rewiring. Suitable for towing rv, carts, trailers, pickups, trucks, ships, motorcycles, bicycle frame, and other cars which come with American sockets. | Package Includes: 1x 7-Way Round to 4-Way 5 Way Flat Trailer Adapter, 1x User Manual, 2 Years Warranty by Nilight.