Video doorbells are a relatively new smart home category, but they closely overlap with standard home security cameras. They are, in fact, doorbells with built-in security cameras.
With doorbell cameras, your guests will ring the buzzer just like they normally do, but you'll get real-time alerts on your phone and a live video look at whoever's there (in addition to a regular ol' chime sound). You and your guest can then chat via a built-in speaker and microphone in the doorbell. In some cases, the device will also work with smart locks so you can let the person in without physically opening the door yourself.
