Voltage supply: 220V, 50Hz -Noise level: ? 40db -Power rating?42W -Ions?8,000,000 ions/cm3 -Product size?305*330*170(mm) -Net weight?3.85KG -Applicable area?30m2 -Air flow volume?240m3/h It succeeds all the purifying technologies like the washable ionizer, biologic HEPA, UV light, also adopt the replaceable ozone generator, the in-built computer system, LED color screen. The environment nurse series air purifiers will bring you humanistic protection and solicitude for your home environment.