Whisper quiet mist; provides relief from cough, cold and flu symptoms. 2.1 gallon cool mist humidifier. Recommended non-medicated alternative for children with cough & cold symptoms; easy to fill tank. Tank fits easily into most sinks preventing strain on back; adjustable humidity output control. Up to 2.1 gallon output per 24 hours; adjustable humidity output control. Up to 2.1 gallon output per 24 hours; option demineralization filter available (not included). Recommended by pediatricians. Type of Humidifier: Ultrasonic cool mist. Power Consumption: 120 volt, 60 Hz, 45 watt. Capacity of Tank: 1 gallon/3.78 liter. Running Time Per Tank: 11 hours. Output per 24 Hours: 2.1 gallon/8 liter. Suitable Room Size: Approx. 500 sq. ft. Acoustic Level: Less than 36.5 (db) A. Additional Features: Auto-off function, variable humidity control. Provides relief from cough, cold and flu symptoms; supports easy breathing and congestion relief; provides moisture for dry coughs, sinus irritation and other effects caused by dry air; whisper quiet ultrasonic operation; auto-off function when water tank is empty; removable water tank for easy carrying and filling; variable humidity output regulator; low power consumption; 1 gallon tank runs up to 11 hours per filling. Safety and performance tested. Made in China.