Finally I got the dump rom from this unit.
It's a clone got in China based on ZX80 Scheme with 8kb+8kb rom and 8kb (6216x4) ram (should be expandable on board to 32kb).
it is a nice kayboard seems same key of the maplin kit for ZX80.
here the link with the rom dump
http://www.zxspectrum.it.omegahg.com/_RPC.htm
and some video in action:
https://youtu.be/HCGwiELzo1g
https://youtu.be/Rgqo2U1-Skg
https://youtu.be/n-2C79MYv8U
appreciated if someone can confirm that the roms are a proper dump and what is inside above the ZX81 basic.
PZ-80 ZX80 Clone dump rom
Re: PZ-80 ZX80 Clone dump rom
Great collection you have. Impressive.