There are a lot of reasons for it. For one thing, it means you can give guests a real-time heads up about when to expect you to answer the door instead of just making them wait outside.
There are a lot of reasons for it. For one thing, it means you can give guests a real-time heads up about when to expect you to answer the door instead of just making them wait outside.
A video intercom system is often more reliable than a traditional doorbell. Instead of the sound-only doorbells that only let the recipient hear who's at the door, an intercom allows you to see whose outside as well.