You would like to change the source that is playing on your Classic H4?
The available sources are DAB, FM, Bluetooth, Aux In and USB.
To choose a source for playback, simply tap on the "Source" button of your Classic H4 to open the selection window.
Pressing the "Source" button repeatedly, or turning the "Select" dial will cycle through the available sources.
To confirm your selection, press the "Select" dial.