Features Breath the difference, Superior purification that can be applied to max. 76m2 room, Professional-grade Aerasense sensing technology, Advanced NanoProtect Filter delivers all-around protection, Special AL auto mode is more effective for allergen removal, Real time PM2.5 feedback and 4 color AQI light, Healthy air protect alert for filter life time with accuracy, Ultra silent under sleep mode with only 33db, Long lifetime performance, Sensor touch UI with big numerical display & Large handle for easy carry around.