About this itemSkip dry air every season with the Dual 150 Ultrasonic Cool Mist Humidifier, featuring ultrasonic mist, top-fill design, and aromatherapy. The humidifier’s 0.79 gal / 3 L tank offers up to 25 hours of mist while effectively covering spaces as large as 290 sq ft / 27 sq m. You can enjoy up to 25 hours of continuous mist on the lowest setting. When it’s time for bed, try adding a soothing essential oil to the water tank to help you drift off to sleep. The healthy humidity can help relieve unpleasant symptoms like coughing, congestion, and runny noses. Features