Geemarc CL50 Notice D'utilisation page 10

Adjust the TONE and VOLUME buttons to adjust
the levels according to your own hearing
requirements.
Bass
+10db max
Note :
When the switch
ON, the extra-receiving and tone functions are
automatically activated each time you use the
phone. When this switch is switched OFF, you will
need to activate the function by pressing the button
.
USING THE PHONE
TONE
Normal
VOLUME
Normal
located behind the phone is
10
Treble
+10db max
+20db max