Slim Design & Universal Compatibility: Slim and lightweight design, a must have for indoor or outdoor usage. It is convenience to put it into your pocket, bags. This external battery charger is compatible with most of mobile phones, tablets, earphones, watch, and other usb charging devices.
Multiple Smart Protection: Lithium polymer batteries, together with multiple smart protection technology, to keep your devices safe from over-charging, over-voltage, over-current, and short circuit.
LED Digital Display: Digital display shows current remaining power, input and output status accurately, no more guessing whether need to charge it or not. Short press power button once to turn it on, short press twice to turn it off.