1.Material:PP,PET 2.Feature:purify air well ,with small volume,portable 3.Certificate:CE,CB,RoHS ... , deodorizating, dust removing,purifying odours, bacteria and other contaminants well:Sterilization:Quick killing harmful bacteria, mould and invisible all kinds ... family: sitting room, study, bedroom, children room, toilet, etc.2.Office: air-conditioned environment, the bathroom, tea and smoking room ...