The humidifier with a 9 liter/2.38 gallon detachable water tank can cover 500 square feet and has a powerful spray volume of 350 ml/hour, helping you sleep comfortably without nasal congestion and coughing during the dry season or dry mouth. At the same time, it can keep your skin moist and effectively prevent skin peeling and cracking. Makes cleaning and filling the humidifier quick and convenient. Top-fill design allows you to pour water and reduces the risk of spills. The 9L water tank is designed to last up to 72 hours of continuous use.You can directly move the machine under the faucet to fill the machine directly Akeshan 562 humidifier has an external humidity sensor that can detect room humidity more accurately. You can customize humidity levels from 55%-95%, with the ability to adjust in 5% increments per touch.