Air Innovations Clean Mist Ultrasonic Dual Tank Humidifier Includes humidifier, two permanent ceramic filters, 15"H removable extension nozzle, remote control with one CR2025 lithium-ion battery Dual directional mist control Five mist levels Two translucent water tanks, 2.15-gallon total capacity Tank capacity allows for up to 120 hours of continued use on the low setting Ultrasonic technology Virtually silent operation Antimicrobial inhibitor to help prevent bacteria from growing inside tank Digital LED display Programmable electronic humidistat Programmable timer with one- to 24-hour increments Automatic shutoff when tanks are dry