The HoMedics® TotalComfort® 2-in-1 Warm and Cool Humidifier uses ultrasonic technology for whisper-quiet, visible, micro-fine mist with warm or cool mist options. Innovative design includes a 360°mist nozzle with removable extended spout to give you maximum mist coverage. The freedom of either table top or floor placement allows you to have mist wherever you need it. The 0.79 gallon / 3 L tank is easy to remove and fill, and provides up to 37 hours of runtime. It also has auto shut-off protection when the tank is empty and a built-in timer up to 12 hours. Diffuse your favorite essential oil with the essential oil tray and included pads. Clean Tank Technology helps protect the tank from mold and mildew. Three mist settings. Remote control, demineralization cartridge, and 3 essential oil pads included.