Cool Mist Oscillating Ultrasonic Humidifier | 120-Degree Rotation, 1 Gallon Tank, 48 Hour Runtime, Nightlight | Clean Tank Technology, BONUS DEMINERALIZATION CARTRIDGE | HoMedics 120-DEGREE OSCILLATING HEAD: The Ultrasonic Humidifier by HoMedics features a motorized nozzle that oscillates 120 degrees. The wide range of rotation allows the unit to provide a wide coverage of cool humidifying mist. The oscillating head can also be stopped at any point in the oscillation cycle to target the mist in a specific direction ULTRASONIC CLEAN-TANK TECHNOLOGY: This humidifier uses ultrasonic high-frequency technology to convert the water into 1-5 million super particles that are dispersed into the air evenly. The clean mist anti-microbial technology helps prevent the growth of molds and mildews on the surface of the tank. It also prevents the buildup of white dust caused by hard water that can settle on your floor, appliances, and furniture. The unit provides micro-fine mist, which is easily absorbed into the air INNOVATIVE DESIGN: The Oscillating Humidifiers elegant design makes a wonderful addition to any room, bedroom or nursery. Its innovative pivoting head features a 120-degree humidifying effect. Or set the nozzle to stay still and target one direction for its air purifying effect. It features a 1-gallon tank that will run up to 48 hours. Its auto shut-off function will power the unit down when it gets too low on water. A useful night light feature is included for your convenience EASY TO USE AND CLEAN: TO USE: Before filling unit with water, turn the power off and unplug the unit from outlet. Remove oscillation nozzle and tank cap. Fill the tank with clean cool water. Replace cap and nozzle. Place tank on base and power on. TO CLEAN: To remove any scale or build-up, use a 50/50 mixture of vinegar and lukewarm water to clean the inside of the tank. Suggestion: Clean the water tank once every 2-3 weeks, depending on your water conditions WHATS INCLUDED WITH YOUR PURCHASE: One HoMedics Cool Mist Oscillating Ultrasonic Humidifier. One BONUS demineralization cartridge. One users manual. One Year Limited Warranty