The counter' component mainly include:
1) the plastic number signed wheels,
2)a press-button, a buckle to fix the counter on people ,
3)a knob installed at one side of the metal shell to return the number of the wheel to zreo .
It has three bits and the Transmission shaft is 1:1.
And the shell is also can be changed by plastic if customers' requirments, while the color is also have several choices.



