Relax and rejuvenate with this Ultrasonic Aroma Diffuser/Humidifier. Instantly create a relaxing and aromatherapeutic environment by adding a few drops of your favorite essential oil. The ultrasonic technology breaks up the mixture of water and essential oil into millions of micro-particles, diffusing the air stream with activated ingredients of the blended essential oil. Under this richly enhanced effect of aromatherapy, your nerves will be eased, mind will be calmed and skin moisturized. 100 ml Tank Capacity- Operates up to 3-4 hours continuously. Auto Shut-Off- Unit automatically shuts off when water runs out. Up to 250 sq .ft. Coverage. Easy-Change Ceramic Disc- The ceramic disc (ultrasonic plate) will eventually deteriorate due to oil build up. Our disc can be easily changed by the user, thus extending the longevity of the diffuser. The expected life span of the disc is approximately 3,000 hours. UL Listed AC Adapter- Universal adapter 100-240V / 50-60Hz. Input voltage: DC 24V / 0.5A. Power: 12W. Uses universal adapter: 100-240V / 50-60Hz. Water tank capacity: 100 ml. Housing material: Frosted glass. Unit dimension: 7.09"Diameter x 6.62"H.