USB 2.0 Stereo Audio Adapter with Virtual 3D Sound and 5.1 Channel USB Audio Class compliant, Works with Windows, Mac and Linux Real USB Plug-n-Play and Bus-powered ( use USB port to power directly) Digital Class-B power amplifier inside 48K/44.1KHz Sampling Rate for both Playback and Recording Support 3D sound (AC-3) Stereo 5.1-channel sound track Virtual speaker shifter