Evaporative humidifier delivers cooling freshness to the air, with various settings available to customize the output Four-litre water tank offers top filling and has a water level indicator for easy refills Quiet operation ensures it won't interfere with your daily activities Self-cleaning mode removes water stains and odours while air drying mode prevents buildup of pollutants Unit runs for up to 24 hours on the lowest setting and has an auto shut-off function for set it and forget it convenience Child lock feature prevents kids from changing the humidifier settings Compatible with Amaxon Alexa and Google Home