1. The flashlight with solar energy and hand crank charging function. The built-in rechargeable battery allows you to store energy for a long time without the need for an external battery. 2. Classic design, durable, army green and dark black, outdoor survival gear, best gift for outdoor activities. < br> 3. High conversion efficiency, cranking for 6 minutes gives one hour of light, and the flashlight is well lit and easy to use in the dark. 4. Stable shell with hanging spring hook is a good helper for your outdoor life -Excursions and mountain climbers.