1) no need battery
2) Cranking the handle to generate the power energy.
3) 30 seconds cranking can generate power for 15 minute illumination.
4) 3pcs super bright LEDs
5) head part can turn in the range of 240 degree.
6) Push button switch
7) Dimensions: 4.5cm * 3cm * 16cm
8) Material: plastic
9) Unit weight: 165g