Revolving Color Light Crystal Ball Fountain - Whirl (LS1518) Soothing sounds of cascading water create a stress free AMBIENCE with color LED lights lmproves concentration while serving as a Natural Humidifier. Moisturizes the air and release beneficial negative ions Enjoy a tranquility kaleidoscope of a Water Fountain This modern approach to aroma therapy captures an ancient charm while providing a healthy atmosphere No heat or chemicals necessary - just normal tap water. Essential oil or natural lemon juice may be added for aroma