Holmes Small Room 3-Speed HEPA Air Purifier with Optional Ionizer, White HEPA-TYPE FILTRATION: Filter helps remove up to 99% of dust, smoke, pollen, odors, mold spores, and pet dander, filtering particles as small as 2 microns to help provide cleaner air for your home or office; includes one Aer1 filter and uses any HolmesAer1 Series Filter including Total Air, Allergen Remover, Odor Eliminator, and Smoke Grabber CONVENIENT FEATURES: Choose from 3 cleaning speeds to keep air fresh and pure: Select a lower speed while you're home for continued purification with less ambient noise and a higher speed for powerful air purification while you're out DUAL POSITIONING AND COMPACT DESIGN: This compact air purifier can be placed vertically or horizontally anywhere, including a table or desktop; it's recommended for rooms up to 109 square feet or 10' x 11' OPTIONAL IONIZER: The optional ionizer naturally improves the performance of the air purifier while freshening the air. Watts: 49.5 3-YEAR LIMITED WARRANTY: This product comes with a 3-year limited warranty from Holmes HEPA type filter helps remove up to 99% of airborne particles as small as 2 microns from the air passing through it 3 speed settings provide options for different conditions, and optional ionizer assists in particle removal Slim dual positioning design can be placed vertically or horizontally to best fit your space Recommended for rooms up to 109 sq ft (10ft x 11ft), Smoke CADR 70 Any Holmes AER1 Series HAPF30AT, HAPF30AO, HAPF30AH, HAPF300AP Filters or Holmes HAPF30D-U2 HEPA TYPE or Holmes HAPF300D-U2 TRUE HEPA Filter & a Holmes Arm and Hammer Carbon Filter AOR31