Features : iPower Xtra External Battery 6600mAh Tiny and Delicate Energy Drink Design Charge up your devices at any time High Efficiency Switch to power up devices in a short time Safe and Stable to prevent overcharging, over-discharging and short-circuit LED power indicators 3 colors available Compatible with most of the digital devices like iPad, tablets, iPhone, Android series smartphones, iPod, PDA and Bluetooth headsets. Specifications : Capacity: 6600mAh Input: 5.0V==1A (Max) Output 1: 5.0V==2.1A (Max) Package Contents : One piece iPower Xtra External Battery 6600mAh One piece Micro USB to USB cable (20 cm)