The Ring™ Video Doorbell lets users answer the door from anywhere using a smartphone app. The doorbell features an HD camera with night vision, providing a clear view day and night. The doorbell installs in minutes without additional tools. It has a built-in, rechargeable battery to let users install it anywhere,or connect it to existing doorbell wiring. It acts as a security solution as well. Built-in motion sensors can detect movement as someone approaches the door, triggering instant mobile alerts and initiating HD video recording. Users can download the free Ring iOS or Android app to see who’s at the door anywhere.
You can find more information on the Ring website.