Aroma Essential Oil Diffuser,BMOUO 250ml Ultrasonic Air Humidifier with 4 Timer Settings 7 LED Color Changing Lamps, 6 Hours Continous Mist Mode Running,AUTO shut off for Home Yoga Bedroom Baby Room 5 in 1 Functions: Aromatherapy Diffuser, Humidifier, Air Purifier, Ionizer, Night Light Advanced Ultrasonic Diffusing technology which produces vibrations at a frequency of 2.4 millions times per second breaks water and essential oils into extremely fine micro-particles without using heat (heat alters and destroys the properties of essential oils). Ultrasonic diffusing feature ensures the integrity of the essential oils' beneficial molecular structure and allows for ease of healthy bodily absorption Large 250ml water capacity that can continue use up to 5 hours each time. When time is up or there is no water, it will turn off automatically. Press the "Mist" button, choose the timer from 60 mins, 120 mins, 180 mins or ON Improve air quality and prevents damage from second hand smoke, stale air and allergens. It functions as an ionizer by releasing negative ions into the air which combat harmful positive ions. This provides many health benefits, such as: Improves breathing, strengthen the immune system, help to lift your mood and relieve stress Improves the quality of air we breathe. Unit may also be used as a non-aromatherapy humidifier. Provides moisture for Dry Cough, Sinus Irritation, Dry Skin. 45 Days Money Back and 18 Months Warranty