This 4-way flat connector is designed to supply power for tail lights, turn signals and brake lights, as well as a ground connection. It features durable rubber-molded construction and is made with 12" of standard color-coded, bonded wire to easily splice into your trailer's wiring system. This 4-way flat connector is a male-end plug, specifically designed for the trailer side of the connection. It is compatible with all 2-wire vehicle systems.