The OnQ Selective Call 4 Location Intercom Kit combines innovative technology with elegant design The four-room kit includes four room units, a distribution panel and a power supply It enables broadcast or room-to-room communication, and allows up to three simultaneous, private conversations Using the intuitive Graphical User Interface (GUI) on the Liquid Crystal Display (LCD) screens on each Room Unit, you can enjoy basic intercom communication functions such talk, talk to door, monitor and mute The Room Units also handle advanced functions such as dynamic sorting of users or monitoring multiple rooms at the same time Room Unit personalization options include up to 96 customizable room names and four attractive LCD skins Based on the innovation you'd expect from OnQ, installation is simple and efficient, with unit auto-discovery and a convenient Cat 5 / RJ45 connection between the room units and the distribution module; Cat 5 cable sold separately.