6 Channel USB 5.1 Audio Sound Card USB External Digital Optical SPDIF Audio Output Adapter for PC win98 / XP / 2000 / Vista

5.1 Rush Digital Sound Decoder DTS / AC3 Dolby SPDIF Input to channel Digital Audio Converter with Optical SPDIF Coaxial Dolby AC3 DTS stereo(R/L) to 5.1CH Analog Audio (6RCA Output)