Medify Air MA-50 is an air purifier designed to remove up to 99.9% of airborne particles as small as 0.1 microns, reduce odors and VOCs, and capture large particles. It features 4 fan speeds, a built-in timer, a child-lock button, and a filter replacement indicator. The True HEPA H13 filter lasts for up to 2500 hours and should be replaced every year for optimal performance. It also has a pre-filter that can be vacuumed once a month for easy maintenance.