It is very simple to use. The whole unit adopts an automatic intelligent control system. The user only needs to turn on the power for the first time. In the future, the automatic operation will be fully realized. When the water temperature specified by the user reaches the water temperature, the system will automatically shut down. When the water temperature is lower than the water temperature specified by the user, the system will automatically start up and operate, fully realizing that hot water is available 24 hours a day without waiting.