The Coghlan's Dynamo Flashlight is a compact and convenient LED flashlight powered by dynamo technology. Simply crank the handle for one minute and enjoy up to 7 minutes of continuous light from the two super bright LEDs generating 10 lumens. This flashlight never needs new bulbs or batteries and is perfect for keeping in your vehicle, boat, emergency kit, camping kit, or backpack. It's super compact, featuring a fold-away crank handle and clip for easy attachment.