This 200mL large capacity essential oil diffuser is perfect for ultrasonic aromatherapy. Light and fine mist create a realistic 3D flame effect that can be adjusted between a warm yellow flame and cold blue flame. Add 3-5 drops of your favourite essential oils to relieve fatigue, moisturize your skin and ensure a pleasing atmosphere for you to relax. -Extremely quiet and no noise in use. Suitable for working, studying or sleeping. Compact and portable. Can be used as air purifier, humidifier or a night light. Perfect for using at home, hotel, school, bedroom, baby room, air-conditioned room, dry place. -Built-in protection chip. It will automatically turn off if water runs out, making it very safe and reliable. -Timer function available. You can set it to be off at intervals of 1/3/5 hours. Allow you to rest at ease. -Powered by USB cable, which can be directly inserted into the computer USB port or charger plug (excluded).