Notes: Oil is not included in the package. To prolong the lifetime of the item, please keep it dry when storing. If the water added over max line, the mist will be very thin(less water, more mist) If the ultrasonic wave chip was polluted, it may cause error action or default. Please don't touch the internal ultrasonic wave vibration board inside of the water tank directly with your hands.Decription: Looking for a simple way to smell better in your room? The URPOWER Ultrasonic Aroma Essential Oil Diffuser is elegant and easy to use. Just add 100ML of water and a few drops of your favorite essential oil. Advanced ultrasonic diffusion technology quietly releases a soothing fragrant mist up to 6 hours. Automatic shut off safety system when waterless protects the product from being burned out. Keep essential oil 100% natural without burning or heating and automatic shut off safely. The URPOWER ultrasonic aroma humidifier does double duty to make your home smell better for up to 6 hours. This handy unit can diffuses your favorite scented oils without heat, so their holistic properties stay intact.Features: No filters required Whisper-quiet operation Auto shutoff for safety Visually appealing, modern Japanese design Helps with dry, chapped skin, chapped lips and dry sinuses Works with ordinary tap water, plus 2 to 3 drops of essential oilSpecifications: Size:3.1"x5.5" Material: Upper parts PP Input power: AC100-240V 50/60HZ Advanced ultrasonic technology: 2.4MHZLength of the power supply cable: about 51.2 inchPackage Includes: 1 x Oil Diffuser 1 x Charger Adaptor 1 x Manual