This is the Arlo Video Doorbell 2K (2nd Generation): a WiFi connected video doorbell that can run on battery or hardwire for continuous use. It features two-way audio and night vision. It has a security camera that gives you ahead to toes view of the action.
This video doorbell sends you notifications when motion is detected. It has a siren that activates to ward off intruders. You can use your phone to activate it manually.