Details: Notes: Oil is not included in the package. To prolong the lifetime of the item, please keep it dry when storing it. If the water added over the 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. Description: 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 vaporizing 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. First, the humidifier function adds moisture to the air to help you sleep better, cough less, and alleviate dry sinuses. This handy unit also diffuses your favorite scented oils without heat, so their holistic properties stay intact. The result will be moist air. 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 oil Specifications: Size:3.1"x5.5" Material: Upper parts PP Input power: AC100-240V 50/60HZ Advanced ultrasonic technology: 2.4MHZ Length of the power supply cable: about 69.6-inch Package Includes: 1 x Oil Diffuser 1 x Charger Adaptor 1 x Manual.