At first I wasn’t sold on how a smart doorbell would be that much better than my existing old school button. It was time to change the old buttons so I decided to give it a try.Opened the box, connected the wires from the existing doorbell, it fit perfect in my smaller door frame. I downloaded the app and was working in minutes. I’m using the existing bell in my house and that is flawless. You can use thier chime if you wish.The picture is cystall clear. And the night vision keeps it clear at night.The notification in the app work right away and left me know if someone is ringing the bell or if motion was detected with a video.I love the alerts now, if a package get delivered on the doorstep I’m the first to know.I usually work from home in the basement of my home, when someone rings the bell I can quickly see if it a sales person not bother.When guest come over I get a early detection and can great them at the door before they ring!Loving it!