The ICUSBAUDIO2D External USB Sound
            Card lets you add an S/PDIF digital audio output and standard 3.5mm
            analog audio/microphone connections to your system through USB - a
            convenient way to bypass or replace an internal sound card without
            having to open the computer case.
            For home-theater quality sound, the
            USB DAC (digital-to-analog converter) offers 96KHz / 24-bit sampling
            rates for both playback and recording, and a 3.5mm S/PDIF port with
            support for Dolby� Digital 5.1 surround sound (AC3) and DTS�
            pass-through (Note: 5.1 surround sound is supported in Windows�
            only).
            This versatile USB audio adapter
            features an integrated 3.5mm 4-position TRRS connection for your
            headphones or combination headset/microphone. Also a convenient
            external volume control for quick adjustments, a hardware EQ switch
            for Bass or Treble boosting, and an LED status bar to display the
            current sampling rate.
            Backed by a StarTech.com 2-year
            warranty and free lifetime technical support.