Kenwood ProTalk TK-3501 Instruction Manual page 15

Side key
Press to activate its programmable function. The default
press setting is [Squelch Off Momentary]. The default hold
setting is None (no function).
• Refer to "PROGRAMMABLE FUNCTIONS" {p.17}.
Speaker/ microphone jacks
Insert the Speaker/ microphone or Headset plug into this
jack.
LED Indicator Status
Indicator Color
Lights red
Lights green
Blinks red
Blinks green
Blinks red/orange
Transmitting
Receiving a call
Battery power is low
Scanning
The selected channel has not been
programmed and cannot be used.
Meaning
7