The complete kit is easy to install, including all necessary mounting brackets and screws and nuts. The integrated design facilitates your wiring and creates a customized plug-in wiring system for any traction situation. Application: Dual 4 way and 7 way trailer plug lamp adapters are used to connect a 4-pole or 7-pole trailer to a factory 4-pin socket to supply power for taillights, brakes, turn signals, reversing, electric trailer brakes and 12V auxiliary power supply. Multi-plug: Dual-output 4-pin to 4 pin and 7 pin trailer plug wiring adapters provide a variety of traction options, which can tow different trailers from a vehicle end connector; The additional wires used for braking, reversing and power supply functions are more widely used, and the 4-pin factory socket on the vehicle side is converted into a combination of 7-pin rv and 4-wire flat socket. Multi-trailer 4-fork and 7-fork trailer connector adapters provide dual trailer connection, which adapts to a variety of trailer options; One line is multi-purpose, allowing the connection between the mismatched trailer lamp plug and the vehicle socket, which is convenient for use. The trailer electrical adapter is made of high-quality black plastic, contains high-quality tin-plated copper terminals, and is equipped with black sealed oil pipe conduit, which provides good protection, good corrosion resistance and electrical conductivity. ASIN B0DM1DTN88 Brand Name Ruibapa Cable Type Flat Ribbon Unit Count 1.0 Count Part Number P-065 Manufacturer Ruibapa Material Type Copper, Polyvinyl Chloride (PVC) Connector Type 4-pin, 7-pin