Uniden PRO401HH User Manual page 6

Antenna Jack
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Connect the detachable antenna to this jack.
6 Squelch knob
Adjusts the level at which the radio squelches or suppresses weak
radio signals. To filter out weaker signals and background noise,
turn the knob clockwise to increase the squelch level. To decrease
the squelch level so you can hear weaker radio signals, turn the
knob counter-clockwise.
7 Volume Control
Powers on the radio and adjusts the volume.
8 Microphone
Speak into the microphone when transmitting.
9 Wrist Strap Slot
Connect the wrist strap to the belt clip.
10 Speaker Jack
Connects to an external speaker (not includerd). The internal
speaker is disabled.
Microphone Jack
11
Connects to an external microphone (not included).
12 13.8 V DC External Power Jack
Provides power to the unit. you can use external power sources
such as a car battery to power the unit and to recharge the Ni-MH
rechargeable batteries.
13 Transmit Power Switch (HI/LOW)
Select a power output level for transmission.
NOTE: FCC rules reserve Channel 9 for motorist assistance and other
emergency communications. Channel 9 should only be used
in situations where there is immediate danger to the safety of
individuals or the protection of property.
Make sure you have read and understood part 95 of the FCC
rules and regulations before using the transmitter.
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