Schumacher"s 410 Watt Power Inverter converts vehicle power to household power, with 410 continuous Watt and 820 peak Watt. Easily plugs into vehicle"s accessory outlet or connects directly to battery with clamps and features a 5 Volt USB port which powers most electronic accessories. Includes on/off switch and a low battery alarm, with built-in high speed fan to maintain constant and cool operation. The thermal protection shuts unit down if operating temperature is excessive, and surge protection protects against damaging current fluctuations.