Eyourlife Wiring Harness Kit 12V 40A Off Road Led Light Bar Relay On Off Waterproof Switch Relay 120W Eyourlife Switch Relay: Every light bar need one wiring harness,Eyourlife Power Switch Relay Wiring Harness IP56 Waterproof Illuminated On/Off Rocker Switch Eyourlife Security Harness: Eyourlife Relay will regulate the power to be consistent and prevent any surge, it also comes with a pre-installed inline fuse as well as Switch Operating Voltage: 12V Amp: 40A Power Relay Fuse: 40A Blade Fuse. Power Switch Relay Wiring Harness: Easy install and will protect your led light bar; heavy duty wiring suitable for led work light, led light bar, HID and Halogen lights UP TO 52 / 50 INCH LIGHT BARS OR 120 watts. 100% SATISFACTION GUARANTEE: Eyourlife Brand no reason for return or change, hassle free 12 Month warranty.