This humidifier allows for up to 35 hours of continuous humidification and is compatible with aroma oils. It's an ultrasonic humidifier. I'm selling it because it didn't suit my home; when used in a 6-tatami mat room, it over-humidified and the floor got wet. I used it about twice. I think it would work fine if used in a larger room. Please purchase only if you understand this. The original price was 25,999 yen. It's available on Rakuten for 4,000 yen.