... ,PET 2.Feature:purify air well ,with small volume,portable 3.Certificate:CE,CB,RoHS Features:Adopt high speed rotation ... ,releasing many negative ions, and renewable factor, producing fresh oxygen,and purify airAdding humidity:Releasing anion and water molecules, helping ... Europe,Oceania,South Asia,Southeast Asia Picture Showing:Picture one:working theory,Picture two,spare part showing,Picture three, ...