Vornado True HEPA Air Purifier For Up To 335 Sq. Feet with HEPA Filters and Electronic LED Display, Features 4 Speeds and Digital LCD Filter Change Indicator True HEPA filtration captures 99.97% of particles 0.3 microns or larger & Carbon filtration captures odors Push-Button Electronic Controls with 4 Airflow Settings & Sleep Mode LED Control Panel with Filter Replacement Indicator Automatic Dust Sensing and HEPA Filter The # 1 Whole House Air Purifier on the Market!!