The Basics

1/HAM — select the HAM band in service mode.

2/MRN (Marine)

select the

marine band in service mode.

3/AIR — select the air band in service mode.

4/POL — select the police band in service mode.

6/ALERT — turns

NWR - SAME weather alert on and off.

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Radio Shack PRO-528 manual Alert turns