Purifier captures up to 99.97% of airborne particles as small as 0.3 microns, including bacteria, allergens, mold, pollen, smoke, dander and dust. Carbon pre-filter effectively helps neutralize odors. Quiet operation. Circulates room air five times every hour. Three air cleaning levels plus TURBO clean setting. Easy tap electronic controls. Electronic filter replacement indicators. 2-, 4- and 8-hour timer settings.