USB 2.0 External 3D Virtual 7.1 Channel Audio Sound Card Adapter for PC Laptop WIN 7 MAC

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)