User Manual Comfee CFO-BB102 Toaster Oven Countertop

Why not? If you would put frozen waffles in a toaster, then you can put them in the comfee.

No there is no heat adjustment lasting 24 hours.

This is an actual toaster, having heating units on both top and bottom. It toasts, broils, roasts, but has no air frying components. I have not had any air fryer experience, so I cannot comment on air fryer function.

They're adjustable if you mean can the racks be taken out of the oven and placed onto a higher rack level or lower rack level. You only have a couple of options besides the middle rack. I would go with the middle to avoid overdone cooking when it comes to certain foods. Example: Toast, bacon etc...

The upper button has bake, broil and toast options on it. Then you just set the timer which also has a "light toast or dark toast" indicator. Set the timer and BING! It'll shut off automatically (which is handy if you forgot all about it)!

It depends. It has a time-able bake option with temperatures to about 400 degrees. Above that, at 450, is the toast option, but that temperature cannot be sustained because the toast timer will shut it off. It has a 6' x 8' solid tray, and a rack that is slightly larger.