Sockets Technology Development issues

Is it possible to switch on or off the relay by pressing the button in the distribution-free state of the no-code development socket?

For the no-code development socket product, when the router loses power, the device's relay also disconnects. Why is this happening?

The socket is powered by a 220V voltage regulator power supply, why the voltage shown in the App is not 220V?

The voltage sampling circuit of the power statistics socket, why use multiple resistors in series?

What is the difference between metering socket calibration test1 and test2?

What does the overcharge protection function of the socket mean?

What should I do if the energy metering socket fails the production test?

What is the range of power statistics socket power and how accurate is it?

Can the resistance of the voltage sampling circuit at the front of the power statistics socket be changed to 5% accuracy?

What is the difference between the 220V production test and the 120V production test?