Zamel RNK-04 + ROP-02 - 3-wire switch, bridge at lamp for 2-channel?

Hello, I'm a bit afraid to write because the topic is probably trivial and I think I know the answer but I wanted to make sure here. I am doing a small renovation of one of the rooms and I came up with the idea of installing a wireless switch and buying an additional remote control to switch the light on and off. I found a kit on the Zamel website that would be suitable, but I'm a bit worried about the wiring diagram as there are currently only 3 wires to a hardwired switch, one phase and two neutral wires to switch the lamps on. I don't suppose there's any way to bridge it so that it works? And if I gave up one channel and made a bridge at the lamp, would it work? Or are there any solutions whereby the two-channel receiver would run on batteries? This is very cumbersome, does anyone know? I mean, would it be necessary to change the battery frequently.

Don't you have a neutral wire switch in the box?

I am unfortunately not trained as an electrician or anything like that. There are only three wires in the box, i.e. in the one I open under the normal switch. One is black, two are blue and the switch has two buttons, so I assume that there is no such direct wire connected to N. Is it a mistake not to have one?

And all three used. The black one is the power supply and the two blue ones are the receptacles for the chandelier? If so, without a neutral wire you won't connect this device. It requires power and you only have a "phase". Although it is possible to make arrangements so that you have L and N in the box without forging the walls, you will then lose the possibility of sectional lighting.

That's what I was thinking;/. So possibly left to look for something for batteries if there is such a thing. And just out of curiosity, is it a bug that I have it done like this?

It used to be done this way - 'saving' material. As you can see, this effectively hinders any modifications or upgrades. You may still want to look to see if, by any chance, the uncut conductor of the neutral wire is somewhere in the "vicinity" of the box.

Well, unfortunately there's nothing in my plans. There's nothing else there, I took it apart again a while ago. Thanks for your help. Regards.