This bundle includes the following: Superbeam® Stereo Array Microphone USBD-2A Stereo Full Duplex Audio Adapter Built in PureAudio® and DSDA® Noise Cancellation AudioCommander® Software Product Features Andrea's new USBD-2A stereo full duplex audio adapter connects Andrea's Superbeam® Array Microphone, Andrea NC headsets, or headphones to the USB bus. Flexible - use with Andrea's Superbeam Array Microphone, Andrea NC headsets or headphones. With the Superbeam Array Microphone you have a far-field speech recognition solution (with the accuracy of a close talking headset mic) on PC's with a USB port. With the HS-75 Stereo Headphones, you can eliminate echo at your end on IP telephony sites when using Superbeam®. Use with Andrea's AudioCommander software to optimize multimedia control applications.