Ivation Humidifier Ultrasonic Cool & Warm Mist with Digital Humidity Mode, Mist Level Control & Timmer Settings and Waterless Auto Shut-Off Function Ultrasonic Atomizer Produces Cool Mist Switchable Heat Function Adds Warm Mist Mist Can be Set to Low, Medium or High; One Tank Yields up to 50 Misting Hours Disposable Ion Exchange Filter (Included) Reduces Mineral Buildup; Sleek Touch-Button Pad Misting Shuts Automatically When Tank's Empty; 1-12-Hour Built-In Auto-Off Timer