Waterproof and rust-proof hard shell design  Use original American CREE strong 3W LED light bulbs225 lumens of strong light (can illuminate up to about 1 km)  Long-life ultra-bright LED light bulb (available for about 100,000 hours)  Comes with 110~220V charger  Comes with 2200mAH rechargeable lithium battery  Or 2 CR-123 batteries can be used  Comes with 5 types of lighting: super bright light, distress flash and power-saving flat light  It can be used for about 12 hours after charging (about 12 hours of use under flat light / about 2-4 hours under strong light)(Suitable for lighting at home, outdoor activities, camping, security, factories, schools, etc.)