How to use?1.LIGHT Button first:turn on the LED light,color changes automatically 2. second:choose one of LED light color you like 3.MIST ButtonPress first:continuous mist out continuously to select the time Note: 1. Be sure to use a mild detergent if you want to clean the humidifier. 2. Don't fill water over the at any time. 3. Don't switch on power when the tank is empty. 4. Clean regularly as per Maintenance instruction to avoid malfunction. 5. When using it for the first time, wait for 3-5 minutes because the cotton swab is not completely wet. 6. Per 100 ml water proposed to add 2-3 drops of essential oil. Maintenance instruction: 1. Add a small amount of warm kitchen detergent remover. 2. Clean with water. 3. Use swab to wipe gently,and then use cleaning cloth to dry it lightly. Colour:Black Material:ABS Package Contents: 1 x small humidifier 1 x usb cable 5 x cotton swab 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.