This product is a solar emergency charger, whenever and wherever you are, you can charge your mobile phone in time. 10000mAh capacity, equipped with dual USB ports, LED flash light, and a easy carry carabiner for backpack. Green light on when charging by solar, blue light on when USB charging. The portable solar charger shell is made solid and sturdy rain-splash & shockproof, waterproof, dust-proof, it’s an ideal choice for hiking, camping trips or other outdoor activities.Led lights can be used as flashlight with Steady-SOS-Strobe mode. Solar battery charger with solar panel can recharge by solar or outlet. But please do not take solar as main power source as it mainly for topping off. It’s subject to sunlight intensity and panel conversion rate, which may take long time to charge.