This air purifier lets you feel better knowing that your family is breathing cleaner air. True HEPA filtration system removes up to 99.97 percent of airborne allergens as small as 0.3 microns. These allergens include ragweed pollen, grass pollen, tree pollen, household dust, dust mite debris, mold spores, pet dander & smoke. Digital display with timer lets you easily adjust the four speed settings. Carbon odor filter helps fight common household odors & has been treated with Arm & Hammer baking soda. This allows the air purifier to trap larger particles as well as absorb & eliminate odors that may come from pets, garbage, bathrooms, litter boxes, smoke & cooking.