With 12 LED colorful light. No heat or chemicals used Easy to operate, long service life, self-protection. Ideal for indoor or outdoor fountains, water feature, and office use. Add a stunning mist effect to your pond or water tank to filter the bad smell with electro and ultrasonic technology. Notice: This item is only a Mist maker, is not equipped with power supply. Power supply need to be purchased separately Caution for use, Power supply need to be purchased separately The spray head should be flat, the water surface should keep more 5-10mm higher than prominent water lever probe. Do not out the spray head in the water with high concentration acid and high alkali.