This humidifier infuses any room with visible cool mist from its 360-degree nozzle. It has 3 mist settings that hydrate air and help you breathe more easily. The 0.5-gallon top-fill tank is easy to fill and clean. The tank is leak-resistant and gives up to 23 hours of runtime per fill. Clean Tank Technology helps protect the tank from mold and mildew, and the humidifier includes a demineralization cartridge. Add aromatherapy by using the included essential oil pads, or relax with the soothing glow of the built-in 7-color night light. Whisper-quiet operation, the humidifier automatically shuts off when the tank is empty. Ideal for medium-sized rooms up to 258 sq. ft. No filters needed. Includes: Homedics Ultrasonic Humidifier, 3 Essential Oil Pads, Demineralization Cartridge and AC Adaptor.