Features4-in-1 air purifier / heater / fan / humidifier3 independent controls settingsLED low water level indicator lightRemoves, smoke, pollen, dust, animal dander, dust mites from the airDurable, washable cloth wickFour functions, one amazing machine - the Envion Four Seasons FS200 4-in-1 Air Purifier, Heater, Fan & Humidifier. Use functions individually or combine them. The air purifier removes allergens, pollen, dust, smoke and dander. Powerful, innovative airflow fan cools an entire room instantly. Variable heat setting allows for just the right amount of heat. The humidifier function has three settings – low, medium & high. Helps save skin from damaging effects of dry heat. There is an empty water sensor for smart automatic power shut-off for the humidifier. Heater shuts off automatically if the unit is tipped. Warning light indicator for when the unit needs water. True HEPA filtration captures 99.97%* of pet dander, mold spores and smoke down to 0.3 microns. * This air purifier captures at least 99.97% of all allergens and irritants, down to 0.3 microns, that pass through the filter.