> High Performance DC fan, low energy consumption, long lasting > Night operating mode, silent operation, quiet and comforting > Inplanted odor detector, Automatic sensing and analyze air quality, intelligent operation > Double layer plasma static dust collector, easy to clean, no need replacement > Twin fans operating, extra large volume of air rapidly circulate and purify air > 4 steps air quality indicator, clearly shows different air quality > High performance filter effectively removes extra fine particles of 0.1 – 0.3 microns > Negative ions and active oxygen rapidly remove odor and smoke to freshen the air > Large sticker LED ultra-violet lamp is energy saving, effectively sterilize and kill bacteria > Multi-layer professional filter effectively removes harmful gases like acetone, benzene etc |