This oil diffuser is multifunctional to serve not only as an essential oil diffuser but also an ultrasonic cool mist humidifier and nightlight. Improve any living or working space immediately with this elegant and portable diffuser. The small size and gentle light make it a versatile addition to any location in your home. It can improve the air quality by delivering gentle aromatic essential oils and humidity anywhere you need it. Perfect ambiance décor for bathroom, bedroom, living room, office, foyer, meeting room, studio, study or literally anywhere you wish! Features: *Function: Add water to the tank, do not exceed the water level mark and add a few drop of essential oil, press the power button to start. You should feel a gentle vibration and see vapor coming out of the top to indicate it is on. Press down again to stop. Press and hold to turn the light feature on and off. *USE: For Water and Essential oil diffusion only. (DO NOT use Waterless Diffuser or Soap & Candle Oils with this unit) *Health and Wellness: Specifically designed for use with essential oils. Atomize your favorite essential oil with water to create a vapor of fine mist that will deliver humidity and the prefect amount of essential oil scent to your environment. Its quiet function will not disturb your work, sleep, relaxation, or exercise. The essential oil diffusers are made of high-quality BPA-free plastic. *SMALL AND COMPACT: If you are looking for a diffuser which is compact, small, yet puts out powerful mist, then this 3 in 1 aroma diffuser & ultrasonic humidifier is a perfect choice for you. The 3.5in x 6in palm-sized diffuser can easily sit on your bookshelf, office desk, coffee table or nightstand. Powered by USB *AUTOMATIC STOP SAFETY FEATURE: When the water tank is detected to be empty, it will automatically shut down the Unit. Package contents: Oil Diffuser, USB Cable and Instructions