1.Material:PP,PET 2.Feature:purify air well ,with small volume,portable 3.Certificate:CE,CB,RoHS Features:Adopt high ... peculiar smell,odour of ward of hospital), making relaxed air environment.Dust removing: effectively remove dust ,pollen,micro particles ... in the airDecomposition: rapid decomposition air formaldehyde, benzene, ammonia, radon and the harmful gas of ...