1. Remove the thermostatic kettle from the base and connect it with water. The water level line must not exceed the yellow water level line, otherwise the water will boil over. Then put the kettle on the base, plug it in and turn on the switch. Then use the function keys to set the constant temperature and press the water boiling button.
2. When the constant-temperature kettle heats the water to 100 degrees Celsius, the water temperature will slowly drop to the previously set constant temperature, and this temperature will remain unchanged.