Features High Efficiency Built with SunPower polysilicon solar panels, its maximum solar conversion efficiency is up to 22%. Great for converting sunlight into electricity and recharging itself under sunshine. Portable Battery Charger Internal 4200mAh lithium polymer battery can charge USB powered devices with maximum output of DC5V / 1A. Recharged via the solar panel or using the included micro USB cable. With 4 red LED indicator lights to indicate battery levels. Flexible LED Flashlight The high power 1W 4 LED flashlight works perfectly in darkness. Rotatable design is great for camping, reading, biking, emergency, etc. Just press the power button twice, the white LED flashlight will light up. Superior Portable Lightweight, pocket-sized, easy to carry. The collapsible metal holder lets you adjust it to different angles flexibly in order to absorb sunlight efficiently. Easily hang it on your backpack. Perfect for hiking, camping and other outdoor activities. Safe & Reliable Built-in over charging, over discharging, over current, over voltage, over heating and short circuit protection keep you and your devices safe.