Feature 1Multi functional Design: This dual output trailer wiring adapter makes it easy for your vehicle to tow different trailers, equipped with a standard 7-way RV blade socket while retaining the existing 4-way flat wiring. Installation type: Universal installation. 2Weather Resistance: This trailer harness adapter is equipped with dust covers for 4-pin and 7-pin wiring sockets to protect the terminals from water, dust, and corrosion. The attached narrow wire harness can also effectively protect the wiring harness. 3Standard Connection: This trailer crane wiring adapter can be plugged into any standard 4-way flat surface and can be used to connect tail lights, brake lights, turn signals, reverse lights, trailer brakes, and auxiliary power sources (requiring some splicing). 4Easy to Install: This dual output 4-pin to 7-pin trailer adapter wiring can be inserted into your vehicle or trailer line at any time with minimal splicing. It also includes a mounting bracket for easy connection to your trailer or bumper. 5Durable Structure: For long-term use and reliable connection, the housing of this trailer harness adapter is made of durable black plastic that will never rust or corrode.Specification:Item: Trailer Wiring Adapter Connector KitMaterial: ABSColor: BlackProduct Size: 16*10*8cmPackage Weight: 447gPackage List1* Trailer Wiring Adapter Connector Kit