This is an air purifier with humidifier from Iris Ohyama. The humidifier function has two modes: automatic and moisture. The air purifier function has four modes: silent, standard, strong, and automatic. It uses a HEPA filter to capture pollen, allergens, tobacco smoke, mold spores, and other particles. Maintenance is easy; the humidifier heater maintenance lamp will light up to indicate when it's time to clean. Simply add commercially available citric acid and press the cleaning button. (Note) While the functions work, there are times when water leaks. When using the humidifier function, I used it with a waterproof sheet underneath to protect against leaks. The air purification function works without issue. This item has been used in a household and shows signs of wear, such as scratches and dirt. Please purchase only if you understand this. [Product Specifications] Humidifying Air Purifier 18 tatami mats HXF-B40 White Brand: IRIS OHYAMA Maximum Applicable Area: 18 tatami mats Air Purifier Functions: Humidification, Deodorization, Timer Function, Pollen Mode, Tobacco Mode Sensors: Humidity Sensor, Dust Sensor Filter Type: HEPA Filter Tank Capacity (L): 2.3 L Power Consumption (W): 372.0 W Maximum Noise Level (db): 49.0 db Dust Collection Method: Fan Type Width (mm): 297.0 mm Depth (mm): 285.0 mm Height (mm): 662.0 mm Cord Length (m): 1.8 m Weight (kg): 6.5 kg Color: White