Uitrasonic air humidifier Large capacity (6.8L) for Bedroom, Baby Nursery Room and Office, Whisper-Quiet, 360° Nozzle, Auto Shut-Off Timer POWERFUL PERFORMANCE: With humidification up to 4x faster than other brands, a large 6.8L tank, and up to 60 hours of operation, the Classic 300S provides relief in rooms as large as 505 ft.Experience alleviation of congestion, and dry skin. AUTOMATIC CONVENIENCE: With the smart humidity sensor, you don't have to worry about over-humidification anymore. Auto Mode adjusts mist levels and balances your home’s humidity automatically. Just fill the tank, turn on the humidifier, and enjoy CUSTOMIZED HUMIDITY: Dry air can affect your home and health. Wood floors, wallpaper, furniture and houseplants can all can be damaged by dry air. With the VeSync App, you can customize humidity levels to find the right humidity for your home.