Tabata Button: Turning the tone on and off Posted on 08 May 16:02

There is a hidden feature:
You can disable and reenable the piezo if you push the button a very long time (>= 10) sec. in the break-mode (blue).
You’ve pushed long enough, when the LED turns from red to blue again.
The piezo stays disabled until you reenable it or remove the battery.