This is a Sharp PA-1020 electronic typewriter, one of the last series before PC‘s officially replaced typewriters in general, like it was from the late 80‘s to the mid 90‘s.
It works with unrecharchable batteries (4x D), and it already hat lots of functions you possibly wouldn’t expect of something that’s still called a „typewriter“.
So you can change the font and it saves up to 6500 signs , with an external RAM-card up to 99 Pages, before you have to print them. You also have the possibility to add a „Spelling-Module“ for auto correction and it is has a calculator function too.
I can‘t mention everything, but here‘s the link to the user manual of the PA 1050, which works basically the same:
https://www.usermanualguide.com/manuals/sharp/PA1050_OM_GB.pdf