This humidifier uses ultrasonic vibrations rather than normal heat to make mist. It atomizes water and oil through ultrasonic vibrations which can make perfect vapor that preserves the integrity and original therapeutic properties of the oils. It is ideal for ultrasonic aromatherapy, collecting light and mist to create a realistic flame effect, which can be adjusted between soft flame and violent flame. Add 3-5 drops of your favorite essential oil to relieve fatigue, moisturize your skin and ensure you relax in a pleasant atmosphere. It has unique noise reduction technology, noise of the diffuser can be controlled below 36dB. The diffuser also creates a “vapor sound” like white sound to make people feel relaxed and easy to sleep. It is a best gift for your friends and family to keep them away from dry air and relax. Some drops of your favorite essential oil can fill the room with much fragrance for office, gym, spa or home.