Using ultrasonic technology to break down essential oils into a fine mist, this lighted oil diffuser and humidifier provides a healthy alternative to aerosol sprays or candles. Since the mist is circulated into the air for you to breath in, your body can best absorb the therapeutic benefits while enjoying soothing, calming aroma. Enhancing your mood with three warm yellow LED lights, the easy-to-use essential oil diffuser works with tap water and water-soluble essential oil (sold separately), creating a fine mist to fill a 100-150 square-foot area. Features auto/off function when water runs empty, three-mode mist button (high, low, off) and two-mode light button (on, off). Electric diffuser includes UL-listed adapter with 70" cord, measuring cup and operating manual. Plastic. Aroma diffuser measures 7 1/2" wide x 8" high x 7 1/2" deep.