I used to use this, but I haven't in a while, so I'm putting it up for sale. There's water scale inside. It used to work, but I haven't checked recently since it's been stored away. It's a used item. Thank you. m(_ _)m Steam humidifier with an 800ml water tank. - Model Name: KS1-A081 - Water Tank Capacity: 800ml - Humidification Method: Steam - Country of Manufacture: China Thank you for looking.