Improve your indoor air quality with the germ guardian 4-in-1 air purifier. Perfect for allergy sufferers, the HEPA filter captures 99.97% of dust and allergens as small as .3 microns in size! More than just a filter, the optional UV-C light kills germs, while the charcoal filter captures odors. Titanium dioxide (TIO2) treatment combines with the UV-C helping to reduce volatile organic compounds (VOC) that pass through the unit. Standing 22 inches tall, it is lightweight and ideal to use in rooms up to 167 sq. feet. Includes a UV-C control and a filter change indicator. Choose from 3 speeds, including a low speed that runs ultra-quiet.