You are missing the point. The convection oven to which I linked is the original 'air fryer'.
These new 'air fryers' are just a gimmick, are more limiting and have a much smaller capacity.
I've had mine for perhaps ten years. They are amazing. Baking roasting etc
I don't want to try to revive my shop bought croissant at 200 degrees Celsius. 100 to 120 would be more appropriate.
The point being that the original 'air fryer' at a cost of less than 800 baht would be much more versatile.
I understand that you already have the 'air fryer' and hope you can get good use out of it. Just for information, the original design is far more versatile.
Note the one to which I linked, uses the heated element, as opposed to a halogen bulb.