KN90 replacemnt filters (x2)
(Each pack contains x2 KN90 filters) 
5 Layer protection Silver ion activated carbon (patented technology)
High efficiency & low resistance filtration
Anti virus efficiency meets GB2626-2006 KN90 standard
 
Anti bacterial>99%
Antivirus >95%
 
**Filters are recommended to be changed every 1-2 weeks