Working principle:
This product adopts 3-phase brushless generator to generate the power to charge its
inside 40mAh/3.6V LIR2032 battery after rectified and LED lighting model can
be shifted by its circuit control: 3 super bright LEDs on-off 3 red LEDs on-off
for a circle.
Product features:
1. Sealed, it needs no power source, just rotate the hand 
2. Bright white LED for task lighting
3. 3 super bright LED lights (39,000MCD)  
4. Night-vision red LED for alarm
5. Wide mouth for easy mixing and cleaning
6. Ergonomic shape: easy to grip, won't roll
7. Tough polycarbonate won't absorb flavors