[For 8 to 40 participants, medium-to-large conference spaces] Up to 5 separate microphones, each suitable for about 8 conference participants, can be chained. For larger conferencing, you can connect an external microphone and PA speakers. The system can be used for remote classes of about 100 participants or web seminars. [Smooth integration of video and audio for natural remote communication] The YVC-1000 features separate microphone and speaker units. This high-performance, full-range speaker unit can be placed close to the video display so that the audio and video from a remote location blend naturally, while adaptive echo canceller and other Yamaha sound processing technologies facilitate stress-free conversation. The YVC-1000 brings you natural, comfortable remote communication.