... 1)With HEPA,Anion,Healthy wind 2)Fan,4speed,nanometer activity ion 3)LED display ... very convenient for moving, check automatic function ,display air quality in the room automatic. at the same time ... mute sounds working. 3 Automatic function design, display air quality in the room automatic 4 LED display, working station ... function ,keep humidification in the room High quality air purifier manufacturers