Only add water-soluble essential oils (2-3 drops each time) Product information: Power: 2W Voltage: DC 5V Color: pink, white, green Capacity: 220ml Size: about 73 * 73 * 110mm Steps: 1. Take out the filter cotton and completely immerse it in water for about 1 minute; 2. Install the wet cotton filter element with humidifier (please don't miss the small spring) 3. Add an appropriate amount of water and connect the USB cable; 4. Short press the button to start continuous atomization; 5. Short press the button again to start intermittent fogging; press the third time to turn off fogging; 6. Long press the button to turn on the night light; 7. Long press for the third time to turn off the light. The package includes: 1 x humidifier 1 x USB cable 1 x user manual (1inch=2.54cm, 1cm=0.39inch)