Uniden UH038SX-2NB Owner's Manual page 13

Operation
Scan Channel Memory
To store a channel into Scan Channel Memory:
1. Select desired channel using CH / HI / LO key and or key.
2. Press and hold MEM / SCN key. MEM will appear on the display.
Repeat steps 1 and 2 to clear channel from Scan Channel Memory.
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UNIDEN UH038SX-2NB UHF CB Transceiver