NOTE: POWER ADAPTER IS PLACED INSIDE THE WATER TANK. This oil diffuser is powered by a corded electric source. Unique Design: A perfect addition to any contemporary home, office, gym, spa or studio. Compact and portable, the aroma oil diffuser’s cover can be effortlessly removed, easy to fill with water and a few drops of essential oil, helping you readily reap aromatherapy benefits. All in One Function: Aromatherapy Essential Oil Diffuser, Cool Mist Humidifier, Night Light. Multifunction: Moisten Skin, Humidify Air, Relive Stress. With 7 soothing LED lights, you can cycle seven colors or freeze on one fixed color. Lights could be turned on as night light at any time. Wonderful gift for family and friends. Whisper Quiet Ultrasonic Technology: Essential Oil Diffuser adopted advanced ultrasonic technology, it is extremely quiet without annoying noise that won't disturb you when you sleep or at work. No heat is used, making it safe for kids and pets. Safety Design with Auto Shut Off Protection: Essential Oil Diffuser will automatically stop working and keep your unit from being damaged as soon as its water content has been used up. Worry Free Purchase: EQUSUPRO is professional in providing the aromatherapy and fragrance products, all of our products are produced with high quality material. Our 24 hours customer service stand behind our product to make sure every customer is satisfied with EQUSUPRO product.