What do you mean that the express delivery has been signed by ITU? I bought an electric kettle.

ITU should be just a name of express scanning network, and it can also be said to be a symbol. If you sign for it manually, if you don't receive the express mail, you can contact the dispatcher for consultation or call the person in charge of the delivery network directly to verify.

It is formed by stretching aluminum plate, and the electric heating element adopts immersed nickel-plated steel sealed electric heating tube. The electric heating tube is installed at the bottom of the kettle, and the joint with the kettle body is padded with a heat-resistant sealing ring to prevent water leakage.

The lid of this electric kettle is equipped with a strip-shaped vibrating spring self-buzzer (air flow buzzer). When the water temperature reaches 100℃, the air flow will ring. Because this kind of kettle is generally not equipped with a temperature limit controller, the power supply must be cut off manually. This kind of electric kettle has simple structure and low price, and is widely used in families.

Based on the design principle of whistle electric kettle, an automatic temperature limit controller (mainly bimetal thermostat or magnetic thermostat) is added. When the water boils, the generated steam deforms the bimetal of the temperature sensing element and drives the microswitch to cut off the power supply, which greatly improves the safety performance of the electric kettle.

The temperature limiting controllers in some high-quality electric kettles adopt a new type of heat-sensitive material (automatic constant temperature control switch) similar to memory alloy. When the water level in the kettle is lower than the electric heating pipe (the temperature of the electric heating pipe exceeds 100℃), the automatic constant temperature control switch will automatically cut off the power supply to protect the electric heating kettle from scalding.