A video doorbell is a doorbell that includes a camera and allows homeowners to see and communicate with visitors at their door through a smartphone or tablet. It works by using a built-in camera to capture video footage of the area in front of the door and send it to the homeowner's device. Many video doorbells also include two-way audio, allowing people to speak with visitors remotely. These devices are commonly used for security, as they help homeowners monitor their front door and decide whether to answer it or not, even when they are not at home.

“video doorbell”的英语定义和含义

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