Visibly cool, totally clean! The HoMedics® TotalComfort® Deluxe Ultrasonic Humidifier disperses a cool mist you can see with 360-degree coverage in large rooms. The programmable humidistat makes it easy to set your desired humidity level. The top-fill 1.47-gallon tank features a 70-hour runtime with automatic shutoff for up to 12 hours, plus 3 mist settings. Clean Tank Technology helps protects the tank from mold and mildew while the included essential oil tray offers relaxing aromatherapy.