HOTSYSTEM Rocker Toggle Switch SPST ON/OFF 12V/20A LED Illuminated 3Pin for Car Truck Boat Motorcycle (Pack of 1,Blue) Long lifespan:About 10,000 Cycles Mounting:0.47in/12mm for screw hole. Humanized design:Toggle switch with a dustproof waterproof blue 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.