CleanAir Commercial or Industrial Stainless Steel Ozone Generator 7,000 Mg (7g) Air Deodorizer Ionizer, 120 Minute Timer Produces "7,000+ mg" (7G/Hr) Ozone per hour, 120 Minute timer only. Ships UPS Ground. Has two 3.5G per hour strips inside. No filters to clean just wipe off the plates every few weeks if used regularly. Has a "Low" option which activates only 1 of the 3.5G / hour plates, or a "High" option which activates both for a full 7G / hour. MACHINE MUST BE USED IN UNOCCUPIED (NO PETS or PEOPLE) ROOMS OR BUILDINGS ONLY! LIFETIME WARRANTY ON PLATES, 5 YEAR WARRANTY ON MACHINE.