The Energizer 100 Watt Ultracompact Power Inverter easily taps your car's 12-volt battery and turns it into household AC power. It's easy to use—just plug into your car's 12-volt accessory port/cigarette lighter. You can easily adjust the angle with its pivoting head for a more comfortable position. You can power a laptop or small electrical device or you can use the dual USB charging port that shares 2.1 amps.