The OEDRO heavy-duty light switch wiring harness is designed to connect LED light bar within 52 inches to your Auto electrical system and compatible with any off-road light bar, work light or auxiliary lamp. It incorporates an inline fuse holder, a 12V relay, and a waterproof switch. A MUST HAVE for any auto lights and devices equipped with 12 Volt DC power source. Features: Heavy-duty wiring harness for Offroad vehicles. Waterproof on/off switch withstand any rain and moisture. Quick & Easy Installation with flexible 9ft. wires. Compatible with any lighting accessory with up to 300W power capacity. Package Included: 9ft Wiring Harnessx1. On/Off Switchx1. 40A Power Relayx1. 25A Blade Fusex1.