Removes the Uncertainty of Legacy PC Audio Quality and Compatibility Issues, Hi-fidelity external sound card with CD quality digital sample rates * USB 2.0 Full Speed Operation Device Class Specification V1.0 Compliant (Digital Audio Device), Converts the built-in sound of the average desktop or laptop into a rich audio experience designed for PC users who insist on high quality/low noise audio * Small form factor, about the size of a thumb drive, is convenient for portability with audio peripherals, The USB adapter enables the audio device driver platform which supports the Andrea PureAudio noise reduction technology and Andrea hardware peripherals * Can also be used to enhance ANY existing legacy headset, microphone or speakers, USB Stereo Microphone Input and Stereo Speaker Output, Power On / Data Transmit LED Indicator * Win98 SE / Win 2000 / Win XP and Vista Compatible, Mac OS9/10 (without Andrea Software) Compatible, Includes Andrea"s complete PureAudioTM Voice Solutions Software Suite