Audiovox GMRS-1200CH Owner's Manual page 10

Up Channel/Volume Button (10)
In the standby mode, pressing this button will increment the listening
volume. When in function edit mode this button will be used to adjust the
unit's settings.
Down Channel/Volume Button (11)
In the standby mode, pressing this button will decrement the listening
volume. When in function edit mode this button will be used to adjust the
unit's settings.
Mode Button (12)
This button is used to select the various GMRS feature settings such as
channel/CTCSS code selection, VOX mode, etc.
Emergency (EMG) Call Button Button (14)
This radio has a quick access button (EMG) to the Emergency and
Assistance Channel. This channel is not monitored by local authorities.
When using this channel, EMG appears on the display. Pressing this
button will set the transceiver to channel 10, operating on 462.6750 MHz.
External Speaker (SPK)/Microphone (MIC)/(CHG) Jack (6)
This jack accepts an Audiovox headset/microphone connector, or the
Charging Adapter connector, which is supplied with the unit. For additional
optional equipment and accessories for the GMRS-1200CH visit the
Audiovox web site at www.audiovox.com.
Scan/Lock Button (13)
Press this Button momentarily to enable or disable the scan mode. Press
and hold Button for more than 1 second to lock or unlock the key pad,
except Power, PTT and Monitor (M) and Volume Up/Down. When the keypad
is locked, the ( ) icon will display in the top left corner.
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