Charge up to 10 different devices (iPhone / iPad / cellphone / tablet / DC / MP3 / MP4 / PSP and other devices) at simultaneously. Each port provides DC 5V/2.1A USB power output. Highest power rating at 105W / 21 Amps output. Sophisticated circuit design with over-heated, over-current, over-charging protection. Charging will be automatically stopped when battery is full. It's an ideal solution for you or your family / friends and colleagues to charging or powering devices easily.