XUKEY 4-Pin Flat to 7-Way Blade Trailer Plug Adapter Tow for RV Truck Light..

12V 4-Way Flat to 7-Way Round Blade Trailer Adapter Plug Connector for RV Camper Truck Boat with Mounting Bracket Waterproof Cap
Is the wiring system of the original synchronous trailer too complicated?
Don't worry, 4-way flat to 7-way round adapters customize the plug-in wiring system for you to connect the trailer! It converts the 4-pin flat socket to the 7-pin blade round socket, plug and play, and easily synchronizes the trailer's taillights and turn signal lights.

Made of copper, combined with a strong PVC casing, has excellent electrical conductivity, wear-resistance, corrosion-resistance, and is extremely durable.

With spring-loaded protective cover, it is dust-proof and moisture-proof, providing better protection for the adapter plug.
Widely used in most towing vehicles, including trailers, semi-trailers, RVs, etc.

NOTE: 
It does NOT support electric brakes, and doesn't handle with charging circuit.

Package Included:
1x trailer adapter plug
1x mounting bracket
6x screws
6x nuts