Uniden UH7750NB Owner's Manual page 13

DIN-E Installation
(UH7750NB only)
Removing the UH7750NB from the DIN-E Sleeve
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you should plan to remove the UH7750NB from the DIN-E sleeve. This is easily done
using the provided Removal Keys.
Fully insert both Removal Keys straight into the slots on the left and the right edges of
the radio's dress panel. You cannot remove the radio if only one key is available.
Press in fully and the radio will unlock from the sleeve making withdrawal from the
sleeve possible. Store the keys in a safe place for future use.
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UNIDEN UH7740NB UH7750NB UHF CB Transceiver