Number
12
Programmable: External Alarm Key
Default function: Used to activate and deactivate the External Alarm
(Horn & Lights).
13
Programmable: Speaker Control Key
Default function: Used to switch speaker on/off.
14
Programmable: Backlight Key
Default function: Used to dim or intensify the radio's backlight. It has
five intensity options.
15
Push-To-Talk Button (PTT)
Press and hold this button to talk in half-duplex calls or to initiate a
group call, release it to listen.
Press to send status and text messages.
16
Microphone
Before using your MTM800 Enhanced for the first time, remove the
plastic lens protector from the display.
6
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Description