Labex Harmony User Manual, Date: 15 February 2021, # 8
In some cases, talking can be achieved in a
month, in other cases, it can take only 3 days.
For a more detailed guide, please check our blog:
https://labextrade.com/tips-for-using-
electrolarynx/
S
ETTINGS
8.
How to change the volume
You can adjust the volume of each button
individually. To do so, follow this procedure:
1.
Press and hold the talk button which
volume you want to adjust (TALK button
1 or TALK button 2).
2.
While holding the desired Talk Button, press
and hold the Settings Button. The LED
indicator will start glowing in red.
3.
Keep both buttons pressed.
4.
After a few seconds, the device will start
emitting sound on its own. Release all
buttons. The LED indicator will start glowing
