External Li-ion Battery for iPod devices are ideal for long flights, outdoor activities, anytime anywhere iPod devices might run out of power High capacity Li-ion battery cell increases iPod play time approx. 6-8 hrs Supports iPod 4G, iPod mini, iPod shuffle, iPod with color display, iPod nano and iPod with video Compact and sleek design Standard USB port Plug iPod shuffle directly, and use existing 30-pin USB sync cable (not included) for other iPod devices Recharge from computer's USB port convenietly with included cable Built-in battery tester button with battery level L.E.D. indicator Includes 1 USB-A to USB-mini B cable