The HoMedics TOTALCOMFORT dual pack ultrasonic humidifier brings a cool and refreshing breathing experience to your home. Micro-fine cool mist with a 360° nozzle ensures maximum coverage. The 1.3L (0.34 gallon) easy fill tank provides up to 16 hours of runtime. A whisper-quiet design with an auto shut off when the tank is empty. Diffuse your favourite essential oil with the essential oil tray and included pads. Clean Tank technology helps protect the tank from mould and mildew.