Material: ABS Solar emergency charger : when you go outside or have power cuts, you also can charge your mobile phone with solar energy. One USB ports can charge One devices. 37 pcs LED lights at back side for camping and emergency. Built-in 4 LED indicators to show the power level. Portable, easy to use and convenient to carry. Satisfy your need of charging anywhere, anytime when there is sunlight! Built-in solar panel can absorb sunlight, and change sunlight into electricity power to charge the built-in rechargeable battery. Design makes the solar charger especially suitable for outdoor activities such as hiking, riding, travelling, etc. Portable, easy to use and convenient to carry.