Geemarc clearsound amplipower 40 Benutzerhandbuch Seite 13

9 - Volume and tone receiving adjustement
You can increase the volume and adjust the
receiving tone according to your own hearing
requirements.The button +40 dB allows extra-
receiving and tone functions to be activated or not
during the conversation.
When the function is activated, the red light of extra
receiving and tone function located near the button
+40 dB is lit. Adjust the TONE and VOLUME but-
tons to remove the level according to your own
hearing requirements.
Bass
+10db max
Using the phone
TONE
Normal
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Treble
+10db max