By removing the battery, Ring has been able to make the Ring Video Doorbell Pro a bit slimmer and smaller than its first- and second-generation models. The Pro measures 4.5 inches x 1.85 inches x 0.8 inches (11.4 centimeters x 4.7 centimeters x 2.0 centimeters). That’s 6.7 cubic inches (108 cubic centimeters) versus 13.6 cubic inches (223 cubic centimeters) for the Ring Video Doorbell 2—an impressive reduction in volume of more than half.
Update 3/24/16 - Ring has added “Live View” to their feature set. It allows you to access your Ring Doorbell any time you wish. This solves the problem with #3 as long as you are not on battery power. Obviously, it also lets you “dial in” any time you wish to check out your front or back yard (where ever your doorbell is). This is a feature that I like as every once in a while I just like to see if its raining or foggy at the house.
After I finished installing this device I found myself having issues with it for the first 3 days where sensors will go offline for no reason almost every day; suddenly after day 4 maybe, all of the issues disappeared and the system was now working like a well-oiled machine. I reached out to Ring support team and they informed me that there was an automatic update that the brain device was going to perform on its own and that would solve all of the issues I was experiencing. They were indeed 100% correct, after just a few days the system was doing exactly what it was supposed to be doing all along. No issues, no dropped devices, a happy customer here now. If you end up choosing this system and experience issues during the first 3-4 days, please wait a few days for your system to automatically update itself to the latest software and you’ll see the issues magically go away.
Update 1/24/16 - I have found a fantastic use for the Ring Doorbell and Chime. My mother-in-law, now in her 90s, lives by herself. She has become hard-of-hearing and often does not hear the doorbell. By installing the Ring on her door, she now is bothered much less (solicitors tend to recognize it and don't seem to like it) and when someone rings the bell, the Chime, placed by her favorite chair, gives her a better chance of hearing someone at the door.