Water level sensor: If the water level is too low, the ultrasonic fogger can automatically stop working. 【Filter unpleasant odors】The fog machine can add a large amount of mist to your pond or water tank to filter out bad odors with ultrasonic technology. 【Interchangeable Spray Tablets】At the same time, this ultrasonic maker can replace tablets 【Create a better atmosphere】You can place it in your pond, rockery, aquarium, vase, tank, etc. It will create a magical atmosphere. Especially perfect for Halloween and other holidays. More mist: Our pond atomizer can provide more mist than other mist machines. Aerosol quantity ≥ 400 ml/h.