Protable battery for Mobile phone,MP3/MP4,PSP,NDS ,ipod , iphone. Ipad. Spec.1. Battery Type: Li-Pol2. Capacity: 10000mAh/37Wh3 ... . Input:9V/1000mA4. Output: 2*USB 5V/2100mA DC 9V/12V 2000mA5 ... )It can select DC output ot 9V or 12V by the switch,and the opposite LED will ... turn on when we select. Fit for :Mobile phone,MP3/MP4,PSP,NDS,ipod,iphone, ...