StarTech.com USB Stereo Audio Adaptors - StarTech.com ICUSBAUDIO2D, The ICUSBAUDIO2D External USB Sound Card from StarTech.com lets you add an S/PDIF digital audio output and standard 3.5mm analogue audio/microphone connections to your system through USB, offering a convenient way to bypass or replace an internal sound card without having to open the computer case.For home-theatre quality sound, the USB DAC (digital to analogue 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. This versatile USB audio adaptor features an integrated 3.5mm 4-position TRRS connection for your headphones or combination headset/microphone. There is 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.This product is backed by a 2-year warranty and free lifetime technical support. StarTech.com ICUSBAUDIO2D USB Stereo Audio Adapter External Sound Card