User's Manual Part 5

148
Audio System
Mute/Push-To-Talk (PTT)
Press once to mute the audio system volume.
Press or or to un-mute the audio system
volume.
Double press to activate voice recognition feature
on a paired phone.
Low Voltage Mute
If the battery voltage drops to 10.5
+/- 0.5 volts, the radio will mute to
reduce voltage drain on the battery.
Full volume will be restored when
the battery voltage returns to 11.5-
12.5 volts. If battery voltage drops
below 8.5 volts, the radio will turn off. Radio function will not
be available until the battery is fully charged.