Three-stage filter design includes both Filtrete™ filter media and ionization for airborne particulate removal and carbon for odor reduction. Three electronic fan speeds. Automatic filter change reminder. One, two and four hour programmable automatic shut off. Ionizer on/off switch. Three fan speeds. Includes convenient carry handle. Air Cleaner Machine Type: Filtrete™; CADR: 210; Maximum Room Size (Square Footage): 320 sq. ft.