MaterialAB+PC+silicone, CE, RoHS, FCC certificated Package included1 USB, 1 humidifier, 1 replacement cotton core, 1 box NOTE: If the humidifier does not work well 1. Make sure whether the water source is tap water or mineral water.Don't use other water or add oily essential oils, they will block the atomization sheet, resulting in no mist or just a small mist. 2. The entire cotton swab must be completely wetted before use, If the sprayed water is small, please check whether the cotton swab is in good contact with the atomizer and the internal spring. 3.When the cotton wick absorbs too many impurities, the spray volume of the humidifier will be significantly reduced or stop spraying. In this case, please replace the cotton wick in time 4.you can use a cotton swab dipped in a little vinegar to gently wipe the atomization sheet 5.No power or low battery If you have any questions about our humidifiers, let us know anytime and we will be glad to straighten things out for you.