There is a button on your Smart Kettle that allows you to keep the water at a desired temperature.
If you set the Smart Kettle to 80°C, then press the 'Keep Warm' button, the kettle will keep the water at this temperature until you deactivate the feature.
The blue lights located inside the Kettle will come on when the Kettle is actively heating the water or keeping it warm, and will go out once the temperature set has been reached.