... six effections:Photocatalyst,Negative ion,Ozone(O3),Active Carbon, Filter Screen,UV and etc. Air Purifier1). Photocatalyst (TiO2): The product ... respiratory tract infectious disease effectively.4). Ultraviolet radiation (UV): The air cleaner adopts the medical appliance antisepsis ulterviolet ... to reach the purpose of purifying the air.6). Filter Screen: Filtering out the smog, dust, floss, milder ...