What's the adjustment gear on the Arukotch for?

[Eternal Mametchi Fan]

Can somebody tell me what this gear-like, turnable switch on the Arukotch is for? I tried turning it around but it doesn't seem to do anything. It doesn't adjust the volume or contrast or anything like that. There is a minus and a plus sign at the sides of the switch, for minimum and maximum. It doesn't tighten the clip, either.

Here's a pic of the instructions if it helps, but the tiny symbols are too hard to read even in real life. I can read the word "adjustment" and I think "vibration" but I'm not sure...

Please help because I hate not knowing what it does. X'D

 

[Tama-Star_Girl]

Btw, thank you for sending me a better quality image of that page.

The instruction booklet says,

振動感知

調整ダイヤル

ダイヤルを回す
ことで歩数の感
知の強弱を調整できます。

Translated,

Vibration Sensitivity
 
To Adjust The Dial
Turn the dial, to adjust the strength of sensitivity. Senses the number of steps.

I hope that helps.

 

[Eternal Mametchi Fan]

Thanks.