SIKER&reg;16800mAh Brilliant Ultra Slim Dual USB (2.1A / 1 A Output) Portable Power Bank External Battery Charger for iPhone iPad Samsung Galaxy HTC ONE Smartphone Tablets Pc Bluetooth Speakers--white Fast Charging and SIKER Technology: It can aumatically identify and detect your device, delivering its fastest possible joice, fully charge Iphone5S only takes about 1.5 ~3 hours Double USB output: (USB Output 1: 5V 1A; USB Output 2: 5V 2.1A ), charging two devices at the same time; LED indicates the battery status Shape: compact design, easy to hold in your hand and put anywhere your want; Suitable for a wide range of occasion like parties, BBQ and outdoor activities Super protection: overshoot, over-discharge, short circuit, over voltage, leakage, and many other protective functions Package contents: 16800mAh external battery charger, Micro USB data cable.