This thing is truly awesome. Not sure who sells is for less including shipping (Masterflow or Superflow).
Makes it easier and less time consuming.
Air Chuck, Clip On
If you don't use it often, as in many off-road outings, the cheap Masterflow/Superflow MF-1050/MV-50 will do the trick.
Why do I say often?
Having 4 35" or 37" tires to go from 16 - 36 will take a while. Maybe 7-8 minutes per tire.
It has a 40 minute duty cycle so you are right at the edge...