The compact & rugged Freeplay Sherpa Xray LED Flashlight sails above other wind-up flashlights in quality, design & construction. Whilst superb for everyday use, this is also a substantial survival flashlight that you can rely on to provide light when nothing else on board works. A quick wind (about 30 seconds) gives Approx. 20 minutes of light on normal beam & you can rewind at any time for as much shine-time as you want. An LED charge level indicator tells you the optimal winding speed. Fully charged, the flashlight provides 3 hours 20 minutes of ultra bright light, & 20 hours of normal light, using an array of high-efficiency, solid-state, ultra bright white LEDs.