3 power settings with separate On/Off controls for ionizer for extra cleaning Electronic filter indicator reminds you when to replace the filter (Item#913624) Protec antimicrobial treatment helps prevent the growth of mold and bacteria on the filterReduce Indoor Air Pollution - For Small RoomsThis Honeywell HEPAClean® Compact Air Purifier helps capture up to 95% of airborne pollutants and allergens, 2 microns and larger, from the air that passes through the filter. This model not only captures particles such as dust, pollen, pet dander and tobacco smoke, but also features a layer of activated carbon material that helps absorb common household odors.This model fits nicely on tabletops, counters or nightstands and can be placed in a horizontal or vertical position – making it ideal for tighter spaces.• Washable pre-filter• Captures up to 95% of airborne particles, 2.0 microns or larger, from the air that passes through the filter• 3 cleaning levels• Optional on/off ionizer• Electronic filter light indicator tells you when to change the filter• ARB Certified to comply with the federal ozone emissions limit• This Air Purifier has been AHAM