Solar & Hand Crank Powered Flashlights No Batteries Needed --- This no battery flashlight is perfect for emergencies, power outages or anytime you need light. | High Efficiency of Energy Conversion Cranking Flashlight --- Just 1 minute cranking will generate enough power for 1 hour long using time. | IPX6 Waterproof and Submersible up to 45 Feet --- Very durable and handy tool for home and outdoor