Product functions: 1. bicycle lighting and caution 2. efficiency storage by cranking 3. Ultra bright LED 4. charge for emergency Product features: 1. Attached a bicycle mount as bicycle torch.Headlight for lighting red taillinght option for emergency use.More safy and convenient to use in dark. 2. Cranking for power generation to charge the built-in rechargeable NI-MH storage battery.Never need battery.Green power products, money-saving to use no pollution.safy(general battery is easy to seep) 3. Speciality ergonomic design no-brush generation;light weight high efficiency low noise and long-lifetime 4. unique spotlight system design.Satisfact the short or middle distance lighting requirement. 5. high efficiency to charge for emergency(charge for the mobile phone and other IT products ) 6. Use as bicycle torch or hand-cranking flashlight(cabinet design suit to carry).convenient to use Combine an usage of the headlight and taillight 1.The light setting before installation: loosen (counterclockwise) the ?panner?of the headlight setting open the ouch ,attached the bicycle kickstand at a suitable position(near middle),screw down (clockwise)the ?panner?#65292;make the ouch enclasp the bicycle kickstand. Attn.:there are two gaskets, according to kickstand? diameter ,you can only use one