Specifications: This is an very new item. There are 3 bright led lights. Instruction Hand winding power generation,storagedevice. -Pull the hand winding lever out from the fixed postion-hand winding the lever steadily(either clockwise or anticlockwise) Lighting -Push the lighting switch to turn the LED Lighting on or off -If the light is not strong enough.Hand windingthe lever to brighren the light. LED -led lifetime is moen then 10000hours. -Light time is more than 10mins (at 120rpm for 1 min) Specification Dimensions:142x46x51mm Weight: approx.140gr Power generation and storage device. -Alternator lifetime: Continuous working moren than 100000 rotations _Maximun out power:0.8W (at 120rpm)