WBM Smart Air Purifier 3-stages Filtration System with advanced filter capture pet dander, mold, dust, allergens, pollen, and PM 2.5, filtering particles as small as 0.3 microns to get a healthy breathing by air purifier allergen eliminator, smoke grabber, and odor remover. Also, protect you against harmful pollutants and purify the air. It releases high negative ions and has adjustable fan speeds. Choose from low, medium, or high fan speed settings to meet different air conditions.