Bryan Dynamo LED Flashlight Emergency Handcrank Survival Rechargeable Compact Light Dimensions: 3.5L x 1.5H x 2W inches Hook your keys on the keychain or hook the dynamo to your backpack or belt loop No batteries needed, crank the handle to charge Comes with 3 bright LEDs rated for up to 100,000 hours of use Great for home, auto, camping and emergencies