Ring has a 1080p camera built into it, so when someone rings the doorbell, you can check who it is. You can also use the two-way audio feature to talk with the person -- even if you're not home. With this new partnership, you'll also be able to toggle security features from the Ring iOS and Android app if, say, you see the person at the door is an unwanted guest or you aren't available to answer.
Essentially, Ring's partnership with ADT makes its security features more actionable. You can lock your front door, arm your system, turn on the lights -- all from the Ring app.
Read more: http://www.cnet.com/news/adt-strengthens-its-smart-home-bid-with-a-video-doorbell/