Your question fits with your user name to a degree. i.e. its a bit cryptic.
The Cyclone II is an oiless diaphram type with an internal bleed. It has a built-in, automatic shut-off. By releasing the trigger of your air brush, this model will automatically shut off until the trigger is depressed again. Maximum running pressure Approx. 28 PSI. (1.93 bar) CSA Approved.
I have the Cyclone I which does not have the automatic-shutoff, and it works well enough. It is a bit pricey, and in retrospect, I wonder if one the Home Depot or Walmart units that a lot of people here have had success with might not represent a better value. Aside from the price, it's reasonably silent, and puts out steady air through the airbrush. Also a moisture trap, regulator, and pressure gauge are not included and unless included as part of a special package will have to be included separately.