USB power station-5000mAh. Hit the centre button to charge and press it again stop charging. Wide compatible, double USB output. Powerful with long operation time. Portable and convenivent. High efficiency of power conversion. Electricity-saving function. User friendly, long cycle life and rapid charge. Evironmental friendliness and economic efficiency. Compatible with iPhone 3G/3GS/ 4G, iPod Touch, iPod Nano, cell phones, digital cameras, etc. Output capacity: 18.5Wh (5000mAh). USB output: 5.3V. Charging time: about 8.5 hours. Input: 5V, 500mA. Max output current: 1A.