This amazing flashlight is always ready and working when you need it most. Powered by magnetic force, there are no batteries needed to turn it on. Simply shake the flashlight for 60 seconds and you will have 30 minutes of continuous LED light. Our ultra bright white LED supplies 30,000 MCD (millicandela) output of brightness. The perfect tool to have handy for blackouts, car emergencies or just searching in dark spaces. Impact resistant and waterproof casing can even operate under water. The power of light is just a shake away. Flashlight measures 22cm long.