Feature: High electrostatic plate traps the dust, pollen, smoke etc, as small as 1 micron circulated in the air. 1, Easy maintenance: just wipe the dirt down from the dust collector rod with a cleaning cloth. 2, Releases high-density negative ions to purify the surrounding air-------Negative ions eliminate air borne contaminates such as dust ,pollen ,mold, smoke ,pet dander ,and bacteria ,germs ,allergens. 3, Low sound operation 4, Fashion design Specification Coverage 15m2 Voltage/power 100-250V/50-60Hz / <9W Filtration Efficiency 99.97% Negative Ion density >3.0*106pcs/cm3 Ozone density <0.05ppm Color White /black/blue Net/Gross weight(g) 1250/1740 Product size/packing size(mm) 74.4*95.5*334/90*135*360 Master Carton size(cm) 47*56*37.5 (20pcs/CTN)