Here is a smart video doorbell with WiFi extender that lets you monitor who is knocking on your door. The Zmodo Greet Pro video doorbell has a 180-degree field of view. It combines with window and door sensors in your home to alert you when there is any activity.
Thanks to this kit, you get an alert when someone presses your doorbell. Motion clips are recorded to the cloud for 36 hours for free. Users have the option to set a voice message to greet their visitors.