Features: 1. Standby state, button breathing display, the switch needs to be charged when it shows red light. 2. In the charging state, the red light is always on. When the power is enough, it will turn into a green light after 10 minutes, it will automatically turn off, indicating that it is fully charged. 3. If there is no work for more than 10 minutes, it will automatically enter the sleep state, the indicator light is turned off, and click to wake up. 4. Shortcut keys: quick click 2 times, add water 0.7L, quick click 3 times add water 1.0L, quick click 5 times add water 99L, click pause halfway 5. Long press the button: the water output capacity is selectable, respectively 0.1L-3.0L multi-speed optional, click pause when pumping.