Visibly cool, totally clean! The Homedics Personal Travel Cool Mist Humidifier is a compact and portable travel version of our room humidifiers. Its size makes it the perfect humidifier for home and on-the-go. Our travel humidifier utilizes standard water bottles, 20 oz. or less - making it easy to set up anywhere. Additionally, ultrasonic technology allows for virtually silent operation. The small plant humidifier produces a micro-fine cool mist for up to 9 hours. On its highest setting, this small mister has big coverage. It can moisten the dry winter air in your personal space up to 100 sq. ft.! It has an automatic shut off feature that will power the unit down when it gets too low on water. This protects your unit from overheating and ensures a longer life. It has an AC power cord adapter that detaches making the unit even smaller and easier to fit in your travel bag or purse. Includes (1) HoMedics Personal Travel Ultrasonic Mister, (1) bottle-neck adapter, (1) AC power adapter, (1) bonus travel bag, (1) user's manual.