Generic USB 2.0 External Virtual 7.1 Channel Audio Sound Card Adapter Description:   USB 2. 0 full speed compliant. pports 32KHz, 44. 1 KHz (which two need driver or application software support) and 48KHz sampling rate. pports multi channels audio code interface for virtual 7. 1 channel playback.  Interfaces: 1: MIC IN; 2: SPDIF IN; 3: SPDIF OUT; 4: LINE IN; 5: FRONT OUT; 6: REAR OUT; 7: CEN/BASS OUT; 8: USB IN. pports stereo active speaker or stereo earphone.  duplex playback/ recording audio stream without sound card in PC. so supports conventional audio 2 channels source playback( only Left, Right, channel active). m Requirement: Windows 98SE/ME/2000/XP/Server 2003/Vista, Mac OS9. 1 or higher. /p>  Package Includes:   1X USB Virtual 7. 1 CH Audio Card Adapteriver CDB cable.