Hot Brush

I got a Revlon Ionic Hot Air Brush (1200) this afternoon but I think its not working?
I've never used one before, I have no idea how they work.
The only part that gets hot is the handle that I want, nothing else. Should not get the brush hot?
When I turned it just got really smoky and smelled something burning and I did was turn!
I do not have any instructions for this.

Is it broken? Or am I just missing how it works?

My daughter and I have the same resume is defective and they come with instructions. The brush handle is not hot. Just use it as a stylist who round brush hair dryer that is the brush. Make sure to press the exit button when changing brushes or it comes off, and the brush will not stay on.