1. This is an essential oil diffuser, but you also can use it as a humidifier if you like. 2. Just gently take off the cap, add water and essential oil, enjoy high-quality life.Use Ultrasonic waves to instantly vaporize water and essential oil in the tank, to produce a cool, dry fragrant mist. 3. Low water level auto cut off, safe and reliable. Water tank capacity of 300 ml that can continue use 8-10 hours according to different modes.Easy to adjust moisture outlet. 4. Colorful changing LED lamp, with independent light control, can keep 3 colors changing or stay on one color.with 3 changing LED lights, the diffuser can be used anytime, day or night,to suit any mood.COLOR LED LIGHT AND TIMER SETTING: You can choose among 7 colors between two mode, steady on/changing color. Each color is adjustable between bright and dim. So totally you will get 3 colors to meet your different needs.You can cycle it through 3 colors, set it to one fixed color or turn the light off. Put it in your child's room and use it for a restful night's sleep. The soft light creates romantic atmosphere which helps you escape the hustle and bustle of modern life. 5. PURIFYING AIR AND SUPER QUIET: Adopted ultrasonic technology, this humidifier is extremely quiet when working. Effective removal of formaldehyde, carbon monoxide, bacteria and other harmful substances, so that the air purification, reduce the occurrence of diseases. 6. 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. 7. Designed to be a perfect decorative piece that fits in with any decor. 8.An ideal way to add moist, comfortable air to small bedrooms, babies room, hotel rooms, tabletops，spa and even workplace cubicles.