pay attention: The cotton tube must be moistened to absorb moisture. Working for a long time will burn the circuit board. It is best to work for 2 hours and rest for 2 hours.Step 1: Open the front cover of the humidifier, and then rinse the cotton tube until the entire tube is wet. Step 2: Fill the humidifier with water, and then screw on the front cover. Step 3: Insert the USB cable into the socket, press the switch, the humidifier starts to work.Portable Mini Humidifier:If the cotton tube needs to be replaced, please purchase it on Amazon a cotton tube over 4.7 inches, trim it properly and replace it. The portable mini humidifier is small and portable, very suitable for car travel, bedroom, office, effectively moisturizing the skin and reducing skin peeling. LED 7-color ambient light, effectively let your skin get enough moisture. Good airtightness, no water leakage or electricity leakage when dumped.USB Power: Please buy a power adapter on Amazon, it needs to be plugged into the
