More on Amazon.com : http://www.amazon.com/gp/product/B001CV00HE?tag=thefatkidin06-20 <br /> <br />Pheonix Audio MT304 Video Conferencing Speakerphone Landline Telephone Accessory <br /> <br />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 <br />comes with a USB connection for your PC or MAC computer and a Daisy chain connection to link to other Quattro2s <br />All Quattro2s are expandable in an unlimited chain
