FocusA 11200mah Portable Power Bank external battery charger for Smartphones and Tablets(Black&silver) External Battery Charger Pack Portable Power Bank for iPods, iPhones, iPads, MP3/MP4 players, PSP, NDS or any device with USB charging 4 LED light for power indicator Dual USB can charge 2 devices simultaneously Auto shut off power saving mode Safety Control Protection for over current, over charging, over discharging, over temperature & short circuit