VTech SN6187 Abridged manual - Manual (Page 47)

Telephone operation
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Telephone operation
Speakerphone
When the handset is on a call, press to switch
between the handset speakerphone and the
handset earpiece.
Equalizer
The equalizer enables you to change the quality
of the audio for both handset earpiece and
speakerphone to best suit your hearing. The default
setting is Natural.
Press MENU during a call.
Press SELECT to choose Equalizer.
Scroll to Natural, Treble 1, Treble 2 or Bass,
then press SELECT.
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