Scent Diffuser makes ultrasonic waves in water to create a mist that spreads essential oil particles around the room. When plugged in and turned on, the diffuser quietly vibrates a small disk at very high frequency (up to millions per second) to create the mist it shoots into the air. The diffuser is powered by electricity but does not heat the oils or the water; that allows essential oils to retain all of their therapeutic benefits. Instead of heat, the tiny ultrasonic vibrations evaporate the liquids so that they’re small and light enough to stay suspended in the air, which in turn, means the essential oils can travel around the room and remain active for longer. Diffusing allows you to get the inhalation and aromatic benefits of essential oils without putting them directly on your body.