The signals go from the PC to the USB transmitter, after which they are wirelessly transmitted to the receiver, and then the device connected to the receiver. Note also that the receiver is compatible with CD/DVD music, as well as MP3, WMA, AAC, and Internet radio streams—plus mainstream programs like iTunes, Windows Media Player, and Real Player. Additional features of the Onkyo UWL-1 include optical/analog outputs, 2.4GHz wireless transmissions, and a built-in antenna.