Full Details on Amazon.com : http://www.amazon.com/gp/product/B0046B9O9W?tag=tsukuyomi-20<br /><br />Diamond External Xtreme Sound 7.1-Channel USB Audio Device<br /><br />Dramatically improve your PCLaptop audio quality <br />Dolby digital audio streaming via SPDIF out <br />Volume controlled through your computer or manually on adapter <br />USB spec 20 full speed compliant <br />71 channel DAC output with 16 bit resolution 31 Vpp 11 Vrms biased at 225V output swing control and mute function
