TechniSat DIGITRADIO Bike 1 Manuel D'instructions page 21

Do not touch the aerial while a station is playing. This can lead to impaired
reception and audio dropouts.
Depending on the mounting position of the DIGITRADIO Bike 1 on the
bike, the antenna can also remain folded in. However, reception
problems and dropouts in playback may occur more frequently in
this case.
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