This is a tabletop humidifier from Iris Ohyama. It was manufactured in 2018. I used it for about 2 years. - Humidification method: Heating type - Humidification volume: Approximately 120mL/h - Tank capacity: 1.0L - Operation mode: Continuous humidification (8 hours) Lime scale has adhered to the heater, but it works without any problems. Operation has been confirmed. If necessary, please remove it with a melamine sponge or citric acid solution. Please purchase with the understanding that this is a used item. Thank you for looking.