I found the N50 FCC ID seaching the web:
HLZN50
This is the Fcc documents page:
https://gullfoss2.fcc.gov/prod/oet/c...39;HLZN50'
And this is the document for internal pics:
https://gullfoss2.fcc.gov/prod/oet/f...ive_or_pdf=pdf
But small IC names are not readable, so I will ask again for better pictures.