Deadbolt locking mechanism is in the picture. This looks like it was taken from the interior not exterior. Especially with the door being a push to open.
Looks like a reader or keypad above. Many of the electronic locks look like this, you can put the key in or electronically unlock and turn from the outside. My in-laws have a similar one, if you don't enter the code that part just spins.
This is how mine works. You have the deadbolt lever on both sides, and can spin the exterior one to lock after you scan your key fob. Mine doesn't have a master lock on it though; I got locked out once and they had a special electronics team dedicated to the system show up in like 15 mins and open the door through their computers