Earthquake Disaster Survival Multifunction Survival Kits -- Safety Hammer + Flashlight + LED Lighting + Razor Blade + Radio + Cutter + ...... 1. Crank dynamo: 2 hours can charge full 2. Built-in Li-ion battery 800mAh 3.7v 3. Radio: FM 76-108MHz AM 540-1600KHz, Full power can use 10 hours 4. Led light: full power can use 10 hours 5. Have siren for emergency, 5 hours can be use 6.Can charge mobile phones by cranking.