PRODUCT DESCRIPTION The EVDC500 whole-room, two-tank evaporative humidifier with an Energy Smart DC motor. With more power than a standard Vornado, it delivers our whole-room humidity circulation using 90% less energy versus a comparable Vornado AC motor-driven humidifier. Pressing the leaf button saves even more energy — automatically turning off if it runs out of water. The minimalistic design features clear, easy-fill 1-gallon tanks that are simple to use and maintain, with a low-water indicator that shows when it’s time to refill. Customizable humidity settings paired with precise auto humidity control allow you to tailor the natural evaporation process, leaving a perfectly humidified space free from the white dust that mist leaves behind. The EVDC500 ensures a comfortable breathing environment with the peace of mind of a 5-year satisfaction guarantee and 10-year motor warranty.Hertz: 60 HZ FROM THE MANUFACTURER IMPORTANT INTERNATIONAL DISCLAIMER: This item is built to meet U.S. voltage requirements and may not function properly when used in conjunction with external devices that alter or convert voltage or frequency of electricity. Improper use or shipping the product outside the U.S. will void all warranties.