Buy SONOFF NSPanel?

Hello, I would like to buy the SONOFF NSPanel for my heating
to operate with it, it is an old oil heater, with a normal
Switch is connected to the thermostat, with green-yellow: protective conductor,
Blue: neutral conductor (N), brown: outer conductor.
If that would work with the SONOFF NSPanel, how would I have to
connect?

Can you send me a picture with yhe boiler connection ? The nspanel have 230 /120v depends on arya, it doesn t have a free potential contact.

Is it also possible to deactivate the switches on the nspanel? So that she
are without function, otherwise the heating can be switched on with the button and
switch off, I don’t want that, I only want that via the temperature
regulate!