Permanent True HEPA Round Air Purifier helps remove 99.97 percent of all the airborne particles from the air passing through it, including pollen, cat dander, household dust, tobacco smoke & mold spores. LifeTime permanent filter can be vacuumed. Air purifier offers three speeds, clean filter reminder, patented 360-degree air intake & discharge for effective air cleaning power. Carbon prefilter helps reduce odors & extends HEPA filter life. Certified by the Association of Home Appliance Manufacturers.