Selecting "AUX" as an input activates the "AUX IN" input found on the backside of the Spottune Stream. When there is an active signal on the "AUX IN" input the Spottune Stream will show "RECEIVING INPUT" on the display.
Selecting "USB" as an input activates the "USB input" found on the backside of the Spottune Stream. When USB input is active you will be able to use the "Play/Pause" and "Forward/Backwards" buttons located on the Spottune Stream.
Selecting "Ethernet" as an input activates the network functions of the Spottune Stream. It enables the playlist functions controlled from the Spottune Cloud and Spotify Connect. When Ethernet is active you will be able to use the "Play/Pause" and "Forward/Backwards" buttons located on the Spottune Stream.