The HoMedics True HEPA Small Room Air purifier captures & removes up to 99.97% of airborne contaminants as small as 0.3 microns, giving you cleaner, fresher air for the whole family. It captures and removes allergens, pollen, dust, smoke, pet dander, mold spores, and germs. The carbon pre-filter reduces household odors and captures large particles. 1) 3 air purifying speeds, 2) Replace filter indicators, 3) Integrated night mode turns off display lights during nighttime, 4) Small size accomodates small room up to 114 sq. ft., 5) Includes 1 True HEPA filter and 1 carbon pre-filter.