Special Design The UL listed small round rocker switch has nylon shell and nut, which can be helpful to match with a separate panel, and makes it easier to install and remove. This 12V round rocker switch with shell can be mounted on a 1.1 29mm cutsize panel. Lighted Rocker Switch This round toggle switch comes with 12 volt blue LED light, so when you turn the rocker switch 12V on, the LED light also lights up at the same time, which could indicates the working status of the device. Waterproof Cover This 12 volt rocker switch with a rubber cover can be safely used in moist environment, so that it can be widely applied to marine, boats, ships, automotive, cars, RVs, trucks, off road vehicles, ATVs, and any others that use a 12V power source. ON OFF Switch This 12 volt LED switch comes with a SPST 3 pin ONOFF design, and the rating of this 12V ON OFF switch is 20A 12V DC, which could control the power circuit easily. Easy to Install There are two sets of wires included, and each wire has an internal slot for easy installation and removal without damage. And these 3 pin rocker switches can be mounted on a 0.9 20mm cutsize panel, greatly facilitating the replacement and installation of your device switches.