Featuresr 5732 precise surface holes for air inflow high efficient purification displaying beautiful and elegant appearance at the same timer special design with 3 layer filter purification the primary pet filter for bigger pm filtering hepa filter for pm03 and charcoal filter for hazardous substancer high quality replaceable filter element barrel shaped design 360 degree air inflow 3 layer filter purification can filter 993 pm03 9999 pm25 100 bigger particulate matter like