The Mist Maker produces water vapour via ultrasonic vibration to increase your humidity.
To use it, place it in a bucket or tank of tap water with the water level just above the ceramic plate of the mist maker. For best results, point a fan at it so mist is distributed evenly in your grow room.
Unless you want to keep topping up your tank, you will need a Mist Maker Float; fill your tank right up and the mist maker will just float at the right level until the tank is empty!
Mist Maker Humidifier