air purifier 1.Molecular sieve filter, avoid secondary contamination 2.HEPA filter 3.Lower noise Motor 4.Air quality sensor Detalis:BrandGreecamyGreecamy ModelAP001-01 ... 115, Dust 115,Pollen 115Smoke 220, Dust 220, Pollen 220 Air Flow240(m3/h)420(m3/h) Noise Level30-55(dBA ... , elegant, durability.German EBM motor ultra-quiet, low energy consumption, air volume is the same motor 4-6 times.Finally, the ...