25000mAh High Capacity: Built-in 25000mAh Li-polymer battery, it can charge your phones 8-10 times or tablets 3-4 times compatible with an average of 9 days of usage per charge.4 Solar Panels: With 4 foldable high-effeciency solar panels, up to 1A input current under the sunlight, which is 4 - 6 times faster than the other solar chargers. You can also use micro USB cable to charge it.Dual USB 2.1A Output: Dual 2.1A USB ports allow you to charge 2 devices simultaneously with 2.1A high speed charging. Auto-detect your devices& 39; current to pair the optimal output.Built compatible with Outdoors: Rugged construction is dust, shock and waterproof; Built in LED flashlight with SOS mode, perfect compatible with outdoor emergency.