This ultrasonic cool-mist humidifier gives you and your family the comfortable air quality you need to get a great night's sleep.What it does: It offers variable output settings and an adjustable 360-degree mist lid. The mist output is perfect for humidifying rooms up to 500 square feet. The humidifier runs whisper-quiet, making it the perfect bedroom option for light sleepers, kids and babies.Additional features: It runs up to 24 hours and is also equipped with an automatic shut-off safety feature that turns the unit off when the water runs out. The easy-to-clean design features a detachable bottom fill tank, removable water level sensor and cap.Sizing information: Holds one gallon. No filter required Plastic Wipe clean Imported