Why would you need this metal aroma diffuser on your desk? In winter, when heating is turned on, your home humidity level can drop as low as 10 percent. By comparison, the Sahara Desert has an average relative humidity of 25 percent. When you consider that people are most comfortable when the relative humidity is 40-50 percent, you can see how dry indoor air can take a toll on you and your family. Our small humidifier has a very efficient ultrasonic nozzle, which creates the perfect cool mist that's for 99.9% soluble in the air. This way the mist doesn't come down. On top of that it's also a leak-free design so you'll never wet your desk in case you'll knock it over. Our humidifier is also completely silent, and designed with a nice ambient light.