Air Purifier FILTER: 6-Stage Pre-Filter Removes big dust contained in the air, hairs, big size dust and fiber dust. Nano-Silver Anti-Bacteria Sheet & Filter Remove must, virus, micro dust (over than 0.5um), normal bacteria with very powerful anti-bacteria resin and helps to protect the HEPA filter. HEPA Remove more than 99.97% of contaminated dust such as home dust, ticks, viruses, fungi, etc. which are bigger than 0.01um and including bacteria if remained from LDA filtering process. Multi De-Ordorization Filter Absorbs and removes the bad smell emitted from VOCs, ammonia, formaldehyde, harmful gases such as sulfurious acid gas, nitrogen dioxide and other contaminants. Antibiotic-Coated Sirocco Fan Generating a clean and refresh air with anti-bacteria resin. Plasma Removes virus and MRSA virus, must, germ, fungus, odor of tobacco, toilet, waste- food.