Tabletop Air Purifier with 3-Stage Filtration eliminates 99.97 percent of pollutants as small as 0.3 microns. Tested in an independent lab according to AHAM AC-1 National Standard. A Pre-filter removes larger particles such as dust and pet hair, a HEPA filter removes airborne micro particles, i.e.; dust mites, allergens, bacteria, and pet dander, and an Activated Carbon Filter reduces household odors such as smoke and aromas from cooking. Filters up to a 93 sq. ft. room, 5x per hour. An average CADR (Clean Air Delivery Rate) of 66.4 CFM (Cubic Feet per Minute), Dust: 65.8 CFM, Pollen: 77.5 percent, and Smoke: 55.8 CFM. Touch Controls and 4 settings; Low, Medium, High and Sleep. Shut-off timer with 1, 2, 3, and 8-hour selections, Child Lock, and Replace Filter light indicator with audible sound.