Air Purifier 3 Speeds Perfect For large Room Office(up to 600sq ft) 3 in 1 5 layers true HEPA filter pm 2.5 Removing bacteria,poilen,smoke,mold spores,dust,odors,pet dander Highlights: -- Acrylic Panel Touch Control -- TVOC sensor detects air qualify -- Filters Over 99.97% of allergens and pollutants down to 0.1 microns -- Release negative ion 4million/s -- 1000 hours long last filter ( replacement filter available for sale) -- Eliminates Odors -- Eliminates Smoke -- Ozone-Free -- Replaces 100% of the air in a 900 sq ft space every hour -- Ideal for Allergies, Stuff Nose, Kids, etc. How do air purifiers work? Air purifiers usually consist of a filter, or multiple filters, and a fan that sucks in and circulates air. As air moves through the filter, pollutants and particles are captured and the clean air is pushed back out into the living space. Typically, filters are made of paper, fiber (often fiberglass), or mesh, and require regu