Pentax OPTIO WS80 Operating Manual page 27

You can record sound with the camera. The microphone is located on
the front of the camera. When recording sound, aim the camera at the
sound source to obtain the best sound quality.
Speaker
Microphone
To use the Voice Recording function, assign it to the Green button first.
t' Press the MENU button in a mode.
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The [1_ Rec. Mode] menu appears.
,2 Use the four-way controller (• v) to select [Green
Button].
3 Press the four-way controller (_),
A pull-down menu appears.
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Use the four-way controller (• v)
to select [Voice Recording] and
press the OK button.
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_M_ENUJC ancel _JOK