The device uses ultrasonic waves to produce mist which disperses a soft fragrance. The LED light has two settings. Each press of the light switch cycles the light through high, low, and off settings. * When using with mist function, the LED light will shut off at the end of the timer or when the water tank becomes empty. Corresponding area: Approximately 20-25 square meters Duration: Approx. 3 hours in continuous mode ‧With 4 timer settings (180/120/60/30 minutes) / Use LED light ‧With 2 light settings Product Dimension: Diameter 168 x height 121 mm Tank Capacity: 350ml Package consist of Aroma Diffuser unit, AC adapter, water measuring cup, and User Manual. Precautions for use: please do refer to the User's Manual for your safety.** ●This product is a household electrical appliance. ● This product is not intended for use as interior room lighting. ● Always use essential oils from 100% natural plant extracts with this product. Perfumes, aroma oils containing synthetic perfumes, oils containing impurities or solids, etc. will result in product malfunction. Made in China *This item is under 1-year warranty from date of order ID completion.