Many vehicles only have 12V power outlets towards the front. This extension cord plugs into accessory outlet/cigarette lighter sockets and puts power ports within easy reach for those in the rear of larger vehicles. The red LED lights up to indicate that power is available to those using the extension cord.
The switch in the extension cord turns off the power and LED light to insure there is no battery drain when not in use. When the switch is off, it also blocks any surges to the items that are plugged into it during ignition startup. Designed for products drawing less than 10A.