3Q Electrostatic Ionic Air Purifier Eliminate airborne contaminates such as dust, pollen, mold, smoke, pet dander, and bacteria, germs, allergens. High electrostatic plate traps the dust, pollen, smoke etc.as small as 1 micron circulated in the air. Does not use replacement filters. Easy maintenance:just wipe the dirt down from the collector rod (never has to be replaced) with a cleaning cloth. Two cleanning levels; Choose negative ions control with Low/High settings depending on the condition of the air.