Using a driller, drill four holes on the sides of the plate to grip it on the wall.
All you need to do is to lose out the mounting plate and place it at your wall or front door.

Note that you should setup your Ring Doorbell 2 in your Ring app before mounting it to your door. Installation of the ring doorbell is easy. Use the included level to make sure it is firm. Then put the level – it is included in the package – right in the middle of the baseplate. The important thing is to press the orange button before you slide on the unit to put Ring in the set-up/searching mode. After you press the orange button, the ring around the doorbell button gets illuminated and starts circling. Click here for more information on setting up the ring Video Doorbell 2 in the Ring app. … Scroll down for a step-by-step guide. Physically installing up your Ring Video Doorbell 2 with an existing doorbell is a simple process. The installation process varies slightly for people who have a doorbell. Installation of the Ring Doorbell Pro Without Existing Doorbell. https://www.cnet.com/how-to/how-to-install-the-ring-video-doorbell-2

Instead, it’s a battery-powered device that can operate independently and wirelessly, and you can even get a handful of Wi-Fi-connected chimes (sold separately) to plug in all around your house. Now, you can mount the unit onto the backplate. It's time to dive into the installation, but don't fret. So, you just bought a Ring Video Doorbell Pro to keep an eye on your front door. Now what? The Ring doorbell just slides onto the backplate.
The Ring Doorbell isn’t like a normal doorbell–it doesn’t need to be wired to your existing system (though it can be). If you want a wireless doorbell, just follow these steps: Place the baseplate tightly onto your doorframe.