Features：
Suitable for medium group conferencing calls up to 25-30 persons
3 high sensitive microphones provide 360° audio pickup over 4m
Superb full duplex bi-directional conversation
Echo cancellation eliminates acoustic echo
Noise cancellation removes ambient room noise
Advanced DSP technology for natural conversations
USB connect to PC for Web-conferencing via Skype/MSN etc.
Bluetooth built-in for conference calls via cell-phone
3.5mm audio port for universal connectivity to other devices
Special handset design for switching to private call
Support external recording device.
Support 4-way conferencing situation
2 expandable mic for upgrade to larger conference situations
Max volume: 89dB
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China [CN] 
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