Long to turn on the colorful night light mode; Long again to turn off the night light mode. interface Lighting operation: switch Maximum water level Cotton core slot Water tank USB charging Single-click to long mode; Click again to intermittent mode ( for 6 seconds, stop for 6 seconds) Click again to turn off all modes. Timing mode: 4 hours of intelligent power off to stop spraying. Install the cotton core, soak both ends of the cotton core in water for 2-3 minutes, and then put it directly into the cotton core slot. the upper cover and the water cup cover, close and stick the water cup. After filling with water, it can water for about 5-15 hours