The MoistAIR 3.9-Gallon Digital Contemporary Humidifier features a 3-speed motor with high, medium and quiet settings. The humidifier can provide humidity to an area of up to 2,500 sq. ft. The adjustable humidistat allows you to control the humidity level in your home, and the refill indicator lets you know when the tank needs more water.
It works very good. It is keeping the humidity around 45. It is humidifying a large area. I fill up the tank 4 times a day. Would like a easier tank to fill. Over all this is a very good buy and would get another one if needed.