The Portable Power Supply provides seven hours of emergency power for any device. It can power a lamp, your computer, your tablet or phone. The Portable Power Supply provides AC power for lights, TVs, stereos, small appliances and computers and also includes AC adapter). Furthermore, it provides DC power for jumpstarting cars and boats and USB 2.0 power for phones, laptops and MP3 players. It has a built-in super LED flashlight. You can charge it with AC power or from your car’s power outlet. In an emergency, you can even recharge it with a hand crank.