The Battery Tender 400W Power Inverter provides mobile capability to deliver electric power for AC appliances when there is no traditional AC power outlet available. With the cigarette adapter accessory, you can connect to your vehicles 12 volt battery. That provides the nominal 12 VDC input power for the inverter. You may also use the Alligator Clip accessories to connect directly to the vehicle battery. The Dual AC output connectors provide the means to run a number of traditional appliances like fans, lamps, radios, TVs, toasters, or microwave devices, and others. Also, the 2 USB output connectors provide 5 volt DC power to run other devices like digital cameras, fans, game consoles, GPSs, lamps, and more. An LCD screen provides real-time status of % output power consumption, vehicle battery voltage, and warning data. The limited warranty period is one-year. NOTE: The length of time that any electric appliance will run on the output of any electric power device will be less as the