[Solved] Bistable mode with key synchronisation option, what does it mean?

Good day,

I am not an electrician and have no knowledge of IoT.
I am buying more devices and registering them in SmartHome (previously Tuya) for now.

When configuring the single-channel box relays with N, I am stuck on the switch type settings.

What does bistable mode with key sync option mean?

Explain like a complete layman.
I know the difference between mono and bistable mode. However, I do not know what functions t.bist. with key synchronisation gives in practice.

Thank you in advance for your help.

Exactly what kind of aftermarket relays are these?

Szwonderek wrote:

. However, I don't know what function the t.bist. with key synchronisation gives in practice.

It could be about updating the switch indications.

By trial method