When the device is 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.
11 Display