Therapure Uv Germicidal Air Purifier, Hepa Type, Photo Catalyst, TPP 540 Includes remote control. Powerful 5 stage Purification featuring 3 varying speed levels. Recommended for medium and large sized rooms. Energy Star Certified Air Quality Monitor with Auto Mode that displays air quality and automatically adjusts purification Germicidal UV C Light helps reduce bacteria and germs. Photo Catalyst filter removes Toxic Fumes other VOCs Patented HEMI Spheric HEPA type filtration is most efficient at removing allergens and pollutants from the air. Permanent filter that never needs to be replaced Digital control panel includes 24 hour timer, built-in night mode, ion boost and clean filter indicator. Ionizer with On/Off Button