A power inverter is an electronic device that converts low voltage 10-15V DC (direct current) battery power to 220 – 230V AC (alternating current) household power, especially useful, when shore power is not available. Power Inverters are invaluable for powering for laptops, cell phones and many other appliances. Automatic shutdown provides protection against overload, over temperature and low battery conditions. Includes a cigarette lighter plug. Available in 150W, 300W, 500W, 1000W.