Video Doorbell

A smart doorbell is an internet-connected doorbell that notifies the home owner on their device when a visitor arrives at the door. It activates when the visitor presses the button of the doorbell, or alternatively, when the doorbell senses a visitor with its built-in motion sensors. The smart doorbell lets the home owner use a smartphone app to watch and talk with the visitor by using the doorbell's built-in high-definition infrared camera and microphone.

They can be either battery operated or wired.
Some smart doorbells also allow the user to open the door remotely using a smart lock.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 4.0

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The lock-grade and safe-rating figures throughout this site are drawn directly from the published ANSI/BHMA A156 and UL 72/687 standards — see the ratings reference. Calculators run real math, not AI estimates; guides and articles are written and edited in-house.