This item is the RAV (pronounced rave) 600 -- a complete, out-of-the-box audio conferencing system -- includes an audio mixer with an integrated telephone interface and amplifier, 3 microphones, and 2 BOSE ceiling-mount speakers. It can be used as a higher-quality alternative to premium and standard conference phones for stand-alone audio conferencing. It also easily connects to common rich-media devices, such as video or Webconferencing systems, for enhanced audio performance. RAV 900 adds an extra microphone pod over the RAV 600 to deliver optimal voice pickup in larger rooms. Model includes Ethernet control for remote management and configuration capabilities. ClearOne