11 – Display
When idle the display is not illuminated
By pressing the action button once the display will
turn on.
Announcement volume
Operating mode 1 or 2
Action button
Battery indicator
USB cable connected
Power indicator
Hydrogen production in
process
Adjust the volume of the English announcement
to a comfortable level or switch it off (mute).
Procedure: Turn on by pressing the action
button. Press it 3 times until volume blinks. By
repeatedly pressing, choose the desired volume.
Then wait until blinking stops automatically.
