Purchased in November 2024 and used twice. The appearance and functionality are like new. Includes the instruction manual. This is a steam humidifier that cools boiled, clean steam to approximately 65 degrees Celsius to humidify a room. It is suitable for rooms up to 10 tatami mats (Japanese-style rooms) and 17 tatami mats (Western-style rooms). It has no filter and features a fluorine-coated wide-mouth container, making it easy to clean, refill, and empty the water. The tank capacity is 4.0L, and the rated humidification capacity is 600mL/h. Dual sensors, a "humidity sensor" and a "room temperature sensor," automatically control the humidity for comfortable conditions. Continuous humidification time is approximately 6 hours on high mode and approximately 20 hours on low mode. Humidification type: Steam type, Tank capacity: 4L, Applicable area (Japanese-style room): 10 tatami mats, Applicable area (Western-style room): 17 tatami mats, Installation type: Standalone, Other features: Automatic operation/Child lock