How does a doorbell security camera work?

Common models of doorbell security cameras use Wi-Fi to send notifications and live streaming video to the homeowner, record backup copies on a Cloud server and establish audio communication when the doorbell is pressed or motion is detected. Many services offer a subscription for using optional online data storage.

Doorbell security cameras are often small devices that are mounted where the previous doorbell was positioned. They typically include an illuminated button and are powered by battery or with the existing wiring in the wall. Similar devices that are a well known are door intercom systems that include audio and video communication features. A notable difference between many doorbell security cameras and intercom systems is the use of a Wi-Fi application to create an audio chime on multiple devices simultaneously when the doorbell is pressed.