-Air purifier with humidification -Stylish design idea -Photocatalyst,UV sterilization -HEPA filter ... and Cold catalyst technology layer. Finally, Air come out with vitamin C, like a aroma diffuser spread perfume in the ... in the air, clean and fresh theair. Better effect together with photocatalyst. Anion: (Negative ion) is reputed to be an ... . Air come in the machine and come out with anion too.