Zalman ZM-RSSC Sound Card 5.1channels USB

ZM-RSSC - External 5.1-channel stereo sound card optimized for a home theatre environment Features:
-Small and Compact.
-Easy-to-Connect Plug-n-Play USB Interface.
-Digital & Analog Output This product supports both optical and coaxial types of digital outputs along with analog 5.1 channel outputs.
-3 Volume Controls 3 Volume controls provide independent level adjustments for the Front, Rear, and Center/Subwoofer output channels. (For digital output, the volume can be controlled by a volume control on a speaker.)
-Amplifier included A built-in amplifier provides full sound and ease of use.