Guards against problems cause by dry air in the home. Makes life pleasant for those with cold, flu, allergies and dry skin. Treated with Silver Clean to fight the growth of slimy mold and mildew on the surface of the water tank – a common problem with traditional humidifiers. Comes with aromatherapy tray in back of unit for your favourite essential oils. Ultra-quiet: perfect for all including sleeping children. Ultra-quick: immediately begins to disperse a fine, even mist creating a comfortable environment. Ultra-easy: eliminates evaporating filters that must be cleaned or replaced and breed mold and mildew.