SIIG USB Stereo Audio Adapter (CE-SA0011-S1) HD Audio with 24bit/96KHz, THD+N: -87dB, SNR: 91dB Intuitive Volume Controls and Mute buttons LED indicator for Playback (Green) and Mute Record (Red) Plug-n-Play installation with built-in driver support for Windows and Mac OS Powered directly from the USB bus