Outdoor LED Flashlight: This solar flashlight is made of ABS plastic, durable and waterproof, and easy to use outdoors. The flashlight has three bright white LED lights with high brightness, making it ideal for dark environments. Solar-powered: these LED flashlights are solar-powered, no need of battery operation or electricity; There is a solar panel to store energy, and a hand-crank to generate electricity. Manually shaking a rechargeable flashlight: When there is no sunlight, charging by hand is the most convenient option. Just shaking the flashlight for one minute can generate enough energy to make it work for ten minutes (at a speed of two revolutions per second). Small and Convenient: each solar-powered flashlight is designed with a hook, convenient for you to carry around when you are working or exploring outside; You can hang it with a keychain or fix it on your belt loops so that it won't get lost easily. Wide Range of Applications: these rechargeable crank flashlights are useful emergencies survival gear for outdoor sports, camping, hiking, fishing, boating, backpacking, climbing and so o