Uniden BearTracker 885 Owner's Manual page 11

NB (Noise Blanker) settings (on or off ) Talkback lets you monitor
yourself when transmitting (see page 18).
13. 9/19|DAY/NIGHT: Press to switch between emergency channel 9,
channel 19, and standard CB channels.
14. Frequency Display: Displays the MHz of the selected channel. Also
displays menu options.
15. FUNC|MIC GAIN: Press once to access the second function of
other buttons (indicated after the vertical bar on the button).
Press twice to adjust Mic Gain (see page 18).
16. S.MUTE|AVOID: Scanner Mute mutes the voice from incoming
transmissions. AVOID lets you put channels on a temporary
avoid list so the scanner will skip them (see page 22).
17. RF Gain: Adjust Receive frequency (see page 13).
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18. GPS Jack
19. CB Antenna socket: Connects antenna to the unit.
20. PA SP: Connects optional external 8-ohm, 4-watt speaker for use
as a public address system.
To prevent acoustic feedback, separate the microphone from
the speaker when operating the PA at high output levels.
21. EXT. SP: Connects 8-ohm 4-watt speaker to remotely monitor
receiver.
When an external speaker is plugged in, the internal speaker
is off.
22. Scanner Antenna Socket
23. POWER +12 VDC: Connects DC power to transceiver.
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