Kenwood TK-T300GE - Manual (Page 41)

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Speaker microphone
This accessory allows you to wear the terminal comfortably on your waist while you
make/receive voice calls.
• It has a keypad with PTT, emergency button, and + and - keys which, by default, allow
you to increase/decrease the volume.
• The audio is directed through the microphone and speaker of the accessory.
• It also has a vibration function, which you can program to activate when you receive
each type of call.
• You can make half-duplex calls (pressing either of the PTTs; on the terminal or on the
Speaker microphone), and duplex calls (when you wish to speak, you must press the
PTT).