Whistler BT3200 - Manual (Page 9)

The volume adjustment will be acknowledged as tones through the speakers.
Key Function
[+] KEY
[-] KEY
MASTER KEY [M]
TALK KEY [T]
RESET
MUTE KEY
Button Callouts Button Functions
14 15
ACTIVATE/DEACTIVATE CHANNEL 2
INCREASE VOLUME
ACTIVATE/DEACTIVATE CHANNEL 1
DECREASE VOLUME
PAIRING CHANNEL 2 AS MASTER
REDIALING, ACCEPT CALL
TEMPORARY MUTING OF CHANNEL 1 & 2
RESET OF ALL FUNCTIONS, ALL CHANNELS OFF