Wide-band acoustic echo cancellation with HD-voice dynamic noise suppression, automatic gain control, voice band equalization and intelligent microphone mixing. Best for conference room within 20-60㎡ and supports audio teleconferencing within 15 attendees. 4 inner uni-directional microphones gather over 3m, 360 degree range.Support two extension microphones gather over 5 meters. Support VoIP communication network, SIP2.0 protocol.Support 3 independent SIP accounts. Built-in 3-way VoIP multi-part
