Video door phones provide a video link with sound between the door bell and the monitor inside. So you can see who is ringing your doorbell before you decide to open it or not.
You install the small doorbell camera onto the doorframe and connect the wires. As soon as a visitor rings your doorbell, the picture will get displayed on the home monitor. This way you see who is at the door before you open it (or pretend you're not at home).
You install the small doorbell camera onto the doorframe and connect the wires. As soon as a visitor rings your doorbell, the picture will get displayed on the home monitor. This way you see who is at the door before you open it (or pretend you're not at home).