The Homedics Cool Mist Ultrasonic Humidifier brings a cool and refreshing breathing experience to your home. Micro-fine cool mist with a 360 nozzle ensures maximum coverage. The 0.72 gallon/2.75 L easy to fill tank provides up to 34 hours of runtime. Set the auto-off timer for up to 12 hours. A whisper- quiet design with an on/off night-light function allows for easy use at night. Diffuse your favorite essential oil with the essential oil tray and included pads. Clean Tank Technology helps protect the tank from mold and mildew. A demineralization cartridge is included to help prevent build-up from hard water. As a safety feature, the humidifier automatically shuts off when the tank is empty. Convenient remote control included.