Here is another video doorbell that you can use to easily find out who is knocking on your door. The Arbor has a range of 700 feet. It comes with built-in chime, alarm, and battery life of about 12 months. It has 2MP image quality.
The Arbor’s 115dB alarm is loud enough to scare off intruders. You will need only 2 screws to install this. Its 2MP camera has 1080p resolution. You can set it up to notify you when motion is detected.