Its function combines aromatherapy, anion-therapy, color-therapy, humidifying, air purifier and night lamp together Ultrasonic Aroma Diffuser, Ultra-sonic wave vibrate with water at a frequency of 1,600,000 times/second, releasing plenty of oxygen, anions. Add pure essential oil, it will completely nebulization. Built-in colorful lights, like a beautiful dream. Otherwise, with chic modeling, it ...