100 ML Capacity and Customer Support: With such a large capacity, you do not have to worry that the water will soon run out. This essential oil diffuser is perfect for home use. Any dissatisfaction or suggestion, feel free to contact us at once. Made To Serve Your Needs- 3 in 1 essential oil diffuser that doubles as a cool mist humidifier and night light. You can customize the mist setting to different run time(0.5H/1H/2H/3H and up). ALSO AN ESSENTIAL OIL HUMIDIFIERS: Essential Oil Compatible, you can directly add some drops of essential oil into the water tank, the humidifier turns to an oil diffuser, allowing you to enjoy the fragrance and relax your mind immediately. Whisper-Quiet Design with waterless auto shut off system: Silently and smoothly bring peace and comfort of cool mist to your home and office, no beep sound while pressing the button. Unique Design and Ultrasonic Diffuser : Adopted ultrasonic vibrations technology to disperse essential oils more efficiently, which allow you to absorb the full benefit of essential oils over the longest period of time.Ultrasonic vibration create a superfine mist.