Tabletop air purifier uses a permanent HEPA filter that is 99 percent efficient at reducing airborne particles such as dust, tobacco smoke, pollen, cat dander and mold spores. Filter is easy to clean. Just vacuum every three months. ProTec antimicrobial treatment helps prevent mold growth on the filter. Odor-lock filter technology helps remove common odors. Three-power level ionizer delivers extra cleaning power. Air purifier is designed for use in horizontal or vertical position and recommended for rooms up to 85 square feet. Tabletop air purifier offers translucent backlit controls and electronic filter change reminder.