Computech RaceAir PRO...I never used it. It looks brand new, because it pretty much is. These units are listed for over $500 on a number of sites. I no longer have a race car, so all of my equipment is for sale. I'm a retired 70 y/o fart, former Modified/Comp racer back in the day.I bought a little PRO bracket car to get out and have some fun. Because of me being handicapped now, I can't do it alone, and was not able to find anyone to help me get out to have a little fun. I have the manual that goes with this unit. You can't lose on this deal, as it starts right off being a nearly $200 savings.