Gouptec New External Optical USB Sound Card 6 Channel 5.1 Audio Sound Card Adapter Optical Controller for PC Laptop Computer plug and play, Supports SES/EBU,IEC60958,S/PDIF consumer formats for stereo PCM audio Fixed 48KHZ sampling rate for 5.1 channel playback. Supports analog recording function Supported SCMS copy protection Compatible with Windows XP/Vista/Win7/Win8 etc. Fully duplex playback/recording audio stream without sound card in PC Compliant with USB specification v1.1 USB audio device class v1.0 Supports USB full speed 12Mbit serial data transmission Isochronous transfer uses adaptive and asynchronous synchronization, Support multi channels audio code interface for 5.1 channel playback, Supports conventional audio 2 channels source playback