ESUMIC 12LED Mist Maker Fogger Water Fountian Pond Air Humidifier (Silver) 1: Add a stunning mist effet to pond or water tank to filter the bad smell with electro and ultrasonic technology. 2: Release megative ions to make the air fresher and reduce dust and bacteria. 3: 12 automatically color-changing LED lights make pond and rockery magical once the fog starts to come out. 4: Easy to install and convenient to operate. 5: Perfect for indoor fountains,rockery, landscape, water feature and office decoration use.