300ml Aroma Essential Oil Diffuser, Enegg Ultrasonic Air Mist Humidifier with AUTO Shut off & 6-7 HOURS Continuous Diffusing - 7 Color LED Lights and 4 Timer Settings for Home SPA Baby Bedroom Office 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 300ml water capacity that can continue use up to 8 hours each time. When time is up or there is no water, it will turn off automatically. Press the "Mist" button for more than one second, choose the timer from 60 mins, 180 mins, 360 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 e.g. improves breathing, strengthen the immune system, help to lift your mood and relieve stress. Helps Purify and Humidify the Air and improves the quality of the air we breathe. Unit may also be used as a non-aromatherapy humidifier. Provides moisture for Dry Cough, Sinus Irritation, Dry Skin.