To ensure you can play your favorite files, wether it be Microsoft Media Center Editions (XP or Vista), WMP10-11, iTunes 6-7, all these formats are supported to be visible on the LCD screen of the remote and can be controlled by the remote.
On-screen media selection is the ability to view and select a list of songs, pictures and movies from your PC on the LCD screen of a remote control. The 2-way RF communication incorporated in the remote and the USB dongle provided with it, ensures the content of the PC is transmitted to the remote. So, no need to turn on your TV or monitor to view the menu and select your favorite files.
A USB adaptor is an adaptor that can be connected to your device's USB port to enable control of that device when in a cabinet or in another room. The USB adaptor and the remote have a Radio-Frequency (RF) module incorporated. Over RF, the two communicate with eachother. The commands of the remote will be executed through the USB adaptor, and the content of the MediaCenter PC will be visible on the remote's LCD screen via the USB adaptor.