Ecohouzng Ultrasonic Top-Fill HumidifierEcohouzng humidifiers add moisture to improve air quality for your home and office. It can help to relief the discomforts such as nasal congestion, skin and eye dryness; alleviate many common nuisances such as static electricity and cracks in furniture. Studies also show that the flu virus don't spread well in humidity. Ultrasonic Top Fill Humidifier Runs up to 24 hours per filling on low setting 3 speed mist control, 12 hours timer Humidistat control