Product function description：
1. The important component PTC, the dry burning temperature can be set at any temperature between 150~250. When the temperature reaches the set value, the resistance of the PTC component increases rapidly, and the heating power drops sharply.
2. Using the DS18B20 component commonly used in electronic design, it can detect the temperature inside the kettle in time to prevent dry burning.
3. Using the water vapor generated when the water boils, the bi-metal piece of the steam sensing element is deformed, and the power switch is pushed by the principle of the lever, so that the electric kettle is automatically powered off after the water is boiled.