Radio Functions
1 ON/OFF - Audio ON / OFF.
2 VOLUME - Volume control.
3 DISPLAY - Presents options, menus and information.
4 TUNING - Rotate to manually search stations or navigate
up / down in the menus.
5 SCAN - Find and store the strongest stations.
6 AUTO - Automatic station search.
7 MENU - Opens the main menu.
8 AM/FM - Shift between FM1, FM2 and AM.
9 ENTER - Select in the menu, activate a selection.
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