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KEYPAD LOCK
To avoid accidentally changing the radio setting, press the LOCK
button for more than 3 seconds. The KEY LOCK icon will appear on
the display. PTT and CALL will still be active. Repeat the same
procedure to unlock the keypad.
EXTERNAL SPEAKER/MICR
OPHONE JACK
Your BR777 Series can be used with an optional external
speaker/microphone or headset, freeing your hands for other tasks. To
use an optional speaker / microphone or headset:
l Insert the plug(s) into the SPK/MIC jack.
l Place the earbud into your ear, and adjust the
mic into your desired position.
Model BR777