Geemarc SCREENPHONE User Manual page 34

USING THE TELEPHONE
(with amplify switched on)
15 db
Bass
+10db Max
Amplify Switch at OFF Position
The additional amplification and tone controls are turned off each
time you use the telephone. The LED light next to the amplify
button will be off.
Pressing the Amplify button once during a call will enable tone
control and additional amplification. The LED light next to the
amplify button will turn on to reflect this change. If you press the
amplify button once more, the additional amplification and tone
control features will be turned off once again. The LED light will
turn off to reflect this change.
Irrespective of how many times you press the amplify key
throughout a call, the next time you pick up the handset, these
functions will be turned off once again.
(with amplify switched on)
0 db
VOLUME
TONE
VOLUME
33
30db
Treble
+10db max
15db