The Stadler Form Eva Humidifier uses ultrasonic technology to provide precise humidification, even high up in the air, thanks to an external humidity sensor. In auto mode, Adaptive Humidity technology automatically adjusts the output level to quietly and efficiently maintain the desired humidity. At the same time, the sensor serves as a remote for effortless control. With 5 humidity levels to choose from, ranging from 30 to 75%, the Eva is able to provide a comfortable, warm or cold mist to suit you. Read more… The LED lights can be dimmed or even switched off completely for use at night, and this smart humidifier even distributes a scent of your choice.