Button
/Forward Previous/Next Track (BT)
Backward
DAB
FM
Favorites 1, 2, 3
BT
AUX
Functionality
Tune to previous/next station (DAB or FM)
Step down/up frequency (FM, in 50khz)
Select DAB Source
Select FM Source
Store or select Preset Stations
Select BT Source
Select AUX Source
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