How to use? 1. LIGHT Button Press first: turn on the LED light, color changes automatically 2. Press second: choose one of the LED light colors you like 3. MIST Button Press first: continuous mist output. Press continuously to select the mist duration Note: 1. Be sure to use a mild detergent if you want to clean the humidifier. 2. Do not fill water over the maximum water level at any time. 3. Do not switch on the power when the tank is empty. 4. Clean regularly as per maintenance instructions 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. For every 100 ml of water, it is recommended to add 2-3 drops of essential oil. Maintenance instructions: 1. Add a small amount of warm kitchen detergent remover. 2. Clean with water. 3. Use a swab to wipe gently, then use a cleaning cloth to dry it lightly. Color: Black Material: ABS Package Contents: 1 x Small humidifier 1 x USB cable 5 x Cotton swabs 1 x English manual Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.