Other FeaturesHygienic humidification,NanoCloud technology,Up to 38 m2,Quiet sleep mode,Spreads 99% less bacteria*,Humidity sensor,Knob Control panel type,220 ml/h Humidification rate,38 m² Effective area,31-41 dB(A) Sound level,2L Water tank capacity,Replace Humidification filter once every 3 working months,Made in China.