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39Uniden MHS450 Radio Owner’s Manual
Using the External Speaker/Mic Jack
You can connect an optional external speaker-mic to this
watertight jack. Unscrew the cap which is held by the rubber
cap-keeper to prevent loss. Insert the special gasketed plug
and screw down the shell which assures prevention of water
entering the jack. Two available units are HHSPM Speaker
Mic and VOX100 Headset Mic. For details, consult your
Uniden dealer or call 1-800-BOATING.
Resetting the MHS450
It is possible to completely reset the radio and restore all
the factory default settings. Should you choose to do this,
you must be aware that once you clear memory, there is
no undo.
However, if you desire to clear all your channels stored in
memory, reset all the renamed channels and restore the
scan settings to the factory default (as if you rst opened
the new box), carefully follow the steps below.
With power off, press and hold
down ▲ and 1/2.5/5W at the same time.
While holding both keys down, turn on power.
Release both keys.
Press ENTER. Press and hold 16/9/TRI for 2
seconds. MEMORY CLEAR appears.
Turn power off then on, to complete the operation.
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