The Levoit Smart Ultrasonic Cool Mist Humidifier's convenient smart features and aromatherapy help revitalize the air in offices, nurseries, and other mid-sized rooms for up to 40 hours. Enjoy full control of your humidifier from your phone with the free VeSync app. Monitor your room’s humidity, create schedules and timers, and more. It can cover virtually any room in the house with an effective range of up to 376 ft² / 35 m². The near-silent noise levels help you sleep, while the mist provides relief from dry skin and allergies. Bonus antibacterial cartridge included.