The Mainstays black . 1-gallon . cool-mist humidifier uses evaporative technology to add moisture to dry rooms that have low relative humidity levels. The Mainstays black . cool-mist humidifier has a one-gallon water tank that is easy to remove for filling and is dishwasher safe for easy cleaning! The Mainstays black . 1-gallon . cool-mist humidifier is equipped with a low tank indicator with auto shut off and helps save energy when the tank is empty. Humidifiers offer many benefits to your environment . making your home a more comfortable and enjoyable place throughout the year. Consistent moisture helps to protect wood floors and furniture . and indoor plants. Reduced static electricity benefitting people . computers . and home electronics. The Mainstays black . 1-gallon . cool-mist humidifier adds moisture to the air . which makes the air feel warmer! ?C Now you could keep your thermostat lower while still feeling warm and comfortable during the winter months!