Holmes HM3656BF-U Cool Mist Humidifier with Filter Bonus 2 filters included Runs up to 24-hour Dual tanks for extended run time Designed with wheels for mobility Easy to use digital controls allows you to set your desired comfort level 3.6 gallon tank capacity 3 speeds Whole house humidifier Up to 24 Hour runtime Easy to use digital controls allows you to set your desired comfort level