HOTSYSTEM Rocker Toggle Switch SPST ON/Off 12V/20A Carbon Fiber Cover LED Illuminated 3Pin for Car Truck Boat Motorcycle (Pack of 5, Blue) Long lifespan:About 10,000 Cycles. Mounting:0.47in/12mm for screw hole. Humanized design:Toggle switch with a dustproof waterproof carbon fiber cover,and the rocker with Blue LED light. Widely use:Can be use as a switch for various additional electric equipment inside&outside the car. (Such as ignitions,boost,fans,lights,winches,NOS systems,class A amp fans,computer LED's,and more!). Wiring instructions:One of pin at the bottom connects battery positive pole,the other pin connects equipment positive pole.The side pin connects battery negative pole to illume the light.