Vornado PCO200 Silverscreen Enhanced True HEPA Air Purifier Patented TiO2 media and UV light attacks viruses, bacteria, harmful gases and VOC's that True HEPA filters cannot capture True HEPA filtration captures 99.97 percent of particles 0.3 microns or larger such as dust, pollen, pet dander, smoke, mold spores and more Advanced carbon filter adsorbs common odors from pets, smoking and cooking 3 airflow settings with control lock ability to prevent tampering with settings Coverage up to 175 square feet and backed by a 5-year satisfaction guarantee Built to meet U.S. voltage requirements. Certified, safety-tested, and warrantied for use only in the U.S.