Product Details 2.3 gallon output per day. Ultrasonic. Provides moisture for dry coughs, sinus irritation and other effects caused by dry air. Humidity Control: Variable cool mist output control. Up to 2.3 gallon per day. Mist Nozzle: Multi directional mist nozzle. Tank Capacity: Runs min. 10 hours per tank filling. Whisper Quiet: Provides easier breathing for a good night sleep. Whisper quiet ultrasonic operation. Supports easy breathing and congestion relief. Provides relief from cough, cold and flu symptoms. Auto-off function when water tank is empty. Removable water tank for easy carrying and filling. Variable humidity output regulator. Low power consumption. Technical Specification: Type of Humidifier: Ultrasonic Cool Mist; Power Consumption: 120 Volt, 60 Hz, 38 Watt; Capacity of Tank: 0.9 Gallon; Running Time per Tank: min. 10 hours; Output per 24 Hours: 2.3 Gallon; Suitable Room Size: approx 250 sq ft; Acoustic Level: 35 (db) A; Additional Features: Auto-off function, variable humidity output control. ETL listed. Made in China.