AC and what is it?

[Ranma]

Got my guy back from the shop yesterday. He is running very well the new exhaust works for me Very quiet but there is that nice sound when accelerating.
My problem is the AC is not coming on and the light is on only during automatic. With the top on the car is "stuffy"
Second on the left side of the steering wheel is a button "cruise main" what is it?
Other wise he is doing great, even with a non turbo this guy is going to get me a ticket. Thought it was the noise that attracted police. My guy still gets them to turn their heads.