Humidifier helps work against issues caused by dry air, such as the cold, flu, allergies, and dry skin Up to 120-hour run time on one tank fill 2 gallon tank capacity Ultrasonic Technology provides virtual silence when running and eliminates the need for to replace or clean filters, wicks, or evaporating pads Smart Mist Technology monitors the humidity in the room and adjusts automatically to maintain desired levels Warm or cool humidification in large or small rooms Timer to set a run time of up to 12 hours Silver Clean Technology prevents fungal and mould growth in the water tank On/off soft glow nightlight is perfect for kids Water level window lets you monitor when to refill the tank and the automatic shut-off stops it from running when empty Extended Reach Wands provided for dispersing mist in large rooms