Portable High quality air purifier necklace (Choose Your Color)

Features:
 
1,anion oxygen bar 
 
2,strong purification of for formaldehyde,smoke
 
3,remove PM2.5,the source of allergy
 
4, effective isolation of virus
 
5,small and portable ,not need for consumable
 
6,Zero radiation,quiet breathing.
 
7,charging 20 miuntes can working 5 hours .
 
8,One key operation ,simple ,easy to handle .
 
9,Fashion appearance,can be a necklace