Kenwood NX-420 Instruction Manual page 19

Type III
Antenna
Microphone
Battery pack
Speaker
Transmit/ Receive/ Battery low indicator
If enabled by your dealer, lights red while transmitting,
green while receiving a call (Conventional channels only),
and orange when receiving an optional signaling call. Blinks
red when the battery power is low while transmitting.
Selector knob
Rotate to select a zone or channel/group ID (default).
Power switch/ Volume control
Rotate to turn the transceiver ON/OFF and to adjust the
volume.
Auxiliary (orange) key
Press to activate its programmable function {page 10}.
PTT (Push-To-Talk) switch
Press and hold this switch, then speak into the microphone
to call a station.
Side 1 key
Press to activate its programmable function {page 10}.
The default is [Squelch Off Momentary].
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