The Redline Detection Smoke Pro Total Tech, along with all Redline diagnostic leak detectors, is compatible with shop air, nitrogen, and other inert gasses. The Total Tech uses pressure, vacuum, and visual vapor to quickly diagnose trouble codes, pinpoint EVAP leaks, cooling system leaks, as well as intake and exhaust leaks. It is OEM-approved, made in the U.S.A., and is a field serviceable, lifetime tool with a two-year warranty.