Tabletop air purifier uses a HEPA filter that is 99 percent efficient at reducing airborne particles such as dust, tobacco smoke, pollen, cat dander and mold spores. Four Stage Cleaning System with a three power level Ionizer delivers extra cleaning power. ProTec Antimicrobial treated filter helps prevent mold growth on the filter. Odor Lock Filter Technology helps remove common odors. Air purifier is designed for use in horizontal or vertical position for smaller areas. Recommended for 8' x 10' room size (80 square feet). Air purifier offers translucent backlit controls and electronic filter change reminder.