... cm3Ozone density<0.05pp Feature1.High electrostatic plate traps the dust, pollen, smoke etc, as small as 1 micron circulated ... .Easy maintenance: just wipe the dirt down from the dust collector rod with a cleaning cloth.3.Releases high-density negative ... surrounding air-------Negative ions eliminate air borne contaminates such as dust ,pollen ,mold, smoke ,pet dander ,and bacteria ,germs , ...