The Model 467-RING is based on the Ring Elite intercom and camera system. It has 2 intercoms, allowing the unit to ring a mobile device as well as a POTS systems - ideal for situations when a family member is traveling and someone at home (housekeeper, child, etc) needs to answer the door. It is designed to take advantage of all the features of the Ring Elite, including a push forward notification to the Ring app on your iOS or Android device. It is offered in a variety of finishes and can be customized. The 400 Series is our most popular series and comes with a standard back box size, allowing you to upgrade in the future.