The Arlo Doorbell 45 Mount is designed for the Arlo Wired Doorbell kit. This 45 degree bracket is based on the original and rotated to create a 45 degree angle to the mounting surface. It should be reversible.
When mounted on a side wall in front of our door, the included angle bracket doesn't allow us to see the footpath to the door, so this is a much more intensive angled bracket that lets you see delivery men approaching and their cars.