Pheonix Audio MT304 Video Conferencing Speakerphone Landline Telephone Accessory
Click below to buy on Amazon: http://www.amazon.com/gp/product/B001CV00HE?tag=sportbest-20
The USB is designed for Voice or Video over IP VoIP or can be used for playback of your computers media player or for recording a meeting
comes with a USB connection for your PC or MAC computer and a Daisy chain connection to link to other Quattro2s
All Quattro2s are expandable in an unlimited chain