Essential Oil Diffuser for Aromatherapy &ndash; FOCUSAIRY G-crown 100ml Aroma Humidifier with Changing Colored LED Lights Waterless Auto Shut-off for Bedroom SPA Yoga Continuously moisture your room: Ultrasonic transducer vibrating at a frequency of 2.4 million times per second makes the molecule of water and essential oils so tiny that it is easily absorbed by our body. Perfect for preventing dry and chapped skin in winter. Changing colors: With 7 changing colors for your choice. You can choose any color you like. Besides, it can be also used as a lamp in the evening for those who are afraid of darkness. For your option, you can also turn off the light. Intermittent mist mode: Continuous mode means mist emits continuously and the device automatically shuts off after 3-4 hours of operation. Intervals of 15 seconds mode mean mist emits at intervals of 15 seconds and the device automatically shuts off after 7-8 hours of operation. Auto shut-off safety system: Ultrasonic vapor diffusing keeps the original effect of essential oils instead of burning or heating them that may destroy their original molecular structure. The adoption of non-contact detection technology can protect the diffuser from being burned out when it is waterless or the water level inside the unit is too low. Quiet and relaxing: The whisper-quiet ultrasonic operation, you will hardly hear the noise. Use Ultrasonic waves to instantly vaporize water and essential oil in the tank, to produce cool, natural fragrant mist that can release your stress; relieve you from the busy and tired day.