From the Manufacturer The MXL AC-404 USB web conferencing microphone is an excellent conference room mic for video and web chat. This high quality capsule boundary microphone offers clear voice quality on conference calls, allowing easy, intelligible conversation. The AC-404 captures sound from a 25 ft. radius, making it ideal for conference rooms. It is compatible with all free and paid web conferencing services, like Skype® and ooVoo®. The AC-404 conference mic uses boundary microphone technology, built-in custom circuitry, and automatic gain control to produce smooth, quiet, and professional sounding conferences, no matter where you are. It works well with echo canceling software and offers plug and play compatibility with a PC or Mac® computer.SpecificationsType USB power mic Capsule 3 capsule boundary design with 180-degree coverage Power USB Frequency Response 40Hz - 16kHz Sampling Rate 44.1kHz - 48kHz USB Compatibility USB 1.1 and 2.0 A/D converter 16-bit Delta Sigma with THD+N - 0.01% Product Description The AC-404 is designed to capture crystal clear speech intelligibility for Houses of Worship, web conferencing, court reporting, and more with easy plug-and-play USB connectivity. Three microphone capsules in a surface-mount boundary design delivers an amazing 180 degree pickup pattern with a 25' range making it ideal for podiums, conference rooms, courtrooms and connected classrooms. The low profile design is now available in white and black, and is designed to simply rest on any flat surface so it's both discrete and convenient for every day use