I have not used it yet but I do not know yet.
The only drawback is that you have to buy a transformer, but there is no transformer noise and no vibration. I would like to buy a ring-core transformer.
The humidifier has its own way and the performance is good, but the noise is the sound of the kettle boiling ... It is very convenient to use it. It is not easy to use the heavy transformer.
ZOJIRUSHI Steam Humidifier EN-RM35 / EN-RM50