Bear Motion Multifunctional emergency flashlight to Use in Vehicle with Built-in Hand Crank LED Flash Light / Seatbelt Cutter / Emergency Window Breaking Hammer / Compass / Siren and Magnet (Black) Crank dynamo Built-in Li-ion battery 800mAh 3.7v Radio: FM 76-108MHz AM 540-1600KHz, Full power can use 10 hours Led light: full power can use 10 hours Have siren for emergency, 5 hours can be use / Can charge mobile phones by cranking.