120-Hour Warm or Cool Mist Ultrasonic Humidifier with Digital Display Product Features: Top-fill 2-gallon tank capacity for up to 120 hours of run time No filters to change Visible, micro-fine warm and cool mist 5 mist control settings and 360° mist nozzle Digital display shows ambient and programmed humidity, mist output level, warm or cool mist selection and auto-off timer setting Programmable humidistat between 35% - 60% humidity Auto-off timer up to 12 hours Sleep mode turns off tank and display lights while leaving the machine still running for a perfect night’s sleep Clean Tank Technology helps protect the tank from mold and mildew Essential oil tray Includes 2 demineralization cartridge W1- shelf