The System One VII Intercom System combines advanced technology with simplicity, creating a full-featured intercom, music, and door answering system in one easy to use system. Don't just hear your visitors at your door but go state of the art and see them as well with the System One VII Intercom by Valet. System One VII is an advanced home communications and entertainment system that can support a master station and a combination of up to 20 room stations and door stations.Master Stations available include thisfull sized S1M Master Station, without video capabaility, which is designed to fit in the same sized space as older Valet system masters, or the M200 Compact Video Master Station with the additional video functionality. Door Stations come with or without cameras to accomodate either master. You can also configure a system without a master station that includes just audio door stations such as the Bronze S1FDB or the Silver S1FDS and the S1R room stations available in a variety of colors to match your decor.