Note: 1. Please ensure the arrow on the water tank cap is aligned with the lock on the tank after filling with water, otherwise it may cause a leak 2. Please do not add water directly into the base, otherwise, the humidifier will not work properly (such as no mist coming out)3. The cleaning brush is preinstalled on the base of the humidifier 4. It is recommended to place the humidifier on elevated-level surfaces such as desktops, tables, or nightstands. What’s in the Box: 1 x Ultrasonic Cool Mist Humidifier Classic 200S 1 x Cleaning Brush 1 x User Manual.The product voltage arrange is 120V.