TechCare Air Purifier high-efficiency particulate air (true HEPA) filters, which are proven to trap 99.97 percent of particles of 0.3 microns in size. Silent Comfort allows air cleaner to work under 28 dB. Air purifiers white noise system and night light makes it perfect air purifier for bedroom, office, home use. It eliminates odors, dust, mold, pet hairs, smokes and allergens in the air. This air purifier is specifically designed for smokers or pet owners with multiple pets. If you are smoker or have pet, every home needs air purifier. TechCare Air Purifier features adjustable timer, filter change indicator, 3 levels of speed, sleep mode and night light.