Uniden LRD 766 - Manual (Page 16)

VISUAL ALERT ONLY OPERATION
You can operate the LRD767/LRD777in Visual Alert Only by
setting the
volume control at the minimum position in Full
Alert Mode. At this setting you can barely hear the audio alert
in a quiet environment.
AUTO MUTE OPERATION
Press the mute button to activate the Auto Mute feature.
When the Mute is selected, the unit is in Auto Mute Mode.
In this mode you hear the full audio alert when a signal is
first received. The audio alert automatically reduces to a
chirp for the duration of the warning.
15
WARNING
To operate with
visual alert only, set
the volume control to
the minimum.
Remember though,
if the volume control
is turned down and
Audio Only operation
is selected, the alarm
features are
completely disabled.
OPER
A
TION