By integrating an intercom system into your Greyfox structured wiring distribution system, you'll be able to communicate with your family over inexpensive cat. 5 wiring. Add a Cat. 5 Intercom Room Unit to your Greyfox Intercom System to link another room in your home to your communication system. Each Cat. 5 Intercom Room Unit provides hands-free intercom communication, monitoring, and mute in any room. The Room Units are powered by and require the Cat. 5 Intercom Module, which installs directly in your Greyfox enclosure. Both the Cat. 5 Intercom module and the Greyfox enclosure are sold separately.The Greyfox Intercom System is an expandable broadcast system that will allow you to talk from any unit to all others in the home. This system will support up to 12 indoor Room Units, each of which is trimmed with a standard 2-gang decorator wallplate (included). The Room Unit offers local control of mute and monitor functions. The mute button ensures privacy when needed, while the monitor function comes in handy for families with sleeping children. Calls from the Main Console (sold separately along with the Cat. 5 Intercom Module), can be answered hands-free, so you won't need to dash across the room when you're being summoned. You can even answer the door from any Room Unit if your door is connected to a Door Unit (sold separately). Additional features include 64-step volume control and a separate microphone and speaker. The high quality speaker and microphone provide superior sound quality. The Greyfox Intercom System also interfaces with telephone, audio, and camera monitoring systems for added features. For instance, if you have security cameras installed, you can view real-time video using a 3.5-Inch LCD/Flat Panel Color Display. Just getting started? The Cat. 5 Intercom 4-Room Kit contains everything you'll need to set up an intercom system with four indoor stations and a door station.