Mfresh Plug-in Ceramic Tube Ozone Air Purifier (Fa50) (white, 104&times;95&times;83mm) Plug in the unit to use, easy to carry around. Adopts technology of the most pure ozone ceramic design without any oxide produces. Ozone output can be adjusted upon the size of the space (15~50mg/h). Ozone, as a kind of oxidant to prevent diseases and to cure diseases auxiliary. Without chemicals and no need to maintain the unit by open it Adopts technology of ceramic tube to generate ozone to sterilize the air by its oxidation and be deoxidized into oxygen without secondary pollution