DESC: Duet Executive Speakerphone Phoenix Duet executive speakerphone Adds full duplex, high quality conferencing capability to a desk computer, laptop, or telephone Can be utilized as a computer USB speakerphone for web conferencing, VoIP, instant messaging, video conferencing, etc. (USB port required) Also used as a telephone/cellular speakerphone (2.5mm or RJ11 connection required) Computer and telephone 3 way speakerphone All necessary cables included Mute Volume control Headphone and external speakers connection Plug and play (no driver necessary) Several Duet units can be ganged together to cover a large conference room Works with all IM's SilverDUETEXECUTIVE