Macbook Air after Backup set as Macbook pro

After I have got a new Macbook Air, I reset my latest Backup from my further Macbook Pro in order to keep all my files and software running. The installation went all right, but in the end I found out that the setting of my computer say I am using a Macbook Pro instead of a Macbook Air, and the system misses the dvd-slot which is not installed.

It does not appear as a problem, though, but I wonderd wether it might be a reason to do something about it, and if it was possible to change the settings easily.

Thanks for hints!