--ActivatedCarbonFilterremoveunpleasantodors--Negativeionizedairemittedthensedimentstinyandharmfulparticlesinthetheair--UltrasonicmosquitorepellerreducedmosquitoannoyanceSpecificationEffectiveArea:16squaremeterareaFlow:70m/hPower:35wattOperatingSoundLevel: 45dBNegativeIonOutput:500,000ions(-4.5kv)PowerSource:AC110-240VWeight:1730gapprox.WorkingEnvironment:-20~50 C(4~122 F)R.H.:80%Certificate:CE,FCC,