Phoenix Audio (MT502) Spider PSTN and USB Conference Phone PSTN telephony & USB soft codec connectivity to address both videoconferencing and audio conference meetings. The Spider also support a three way call bridge between both interfaces to provide maximum flexibility Unparalleled daisy chaining capabilities to up to 14 slave units to cover any size conference room Intuitive and interactive user interface that is incorporated through LED lights discreetly placed throughout the unit Spider comes to life when it is in action and displays only the needed functions depending on the specific scenario to provide an easy to use audio solution for your conference room