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, when shore power is not available. Power inverters are ideal for trips with the boat or car to power laptops, cell phones and many other appliances. There is protection against overload, over temperature and low battery conditions, with the automatic shutdown of the power inverter. A cigarette lighter plug is included. Available in 150W, 300W, 500W & 1000W.