unique design with patend protected.Not only ionizer but also HEPA,activated carbon & Photocatalyst,UV light and infrared inside 1.HEPA filter: The purification efficiency for particulate less than 0.0003 mm in the air is more than 99.97%.2.Activated carbon filter: It can effectively break down kinds of poisonous fumes and odor like formaldehyde, benzene, ammonia etc.3.Ions: More than 3 million ...