hi,I'm new here so hope I can put the question right, I have a NanoVNA-H4 v4.2
I did the RTC installed the 32.768khz xtl
everything works fine it has DiSlord's latest
I want to know which board is I haven't see these around

This board not original H4 (and possible not work sd card if install slot)

ok thank you now I know why I couldn't find .any pictures or info on it