Casio fx-300ES PLUS 2nd Edition Scientific Calculator. No Cover.
Battery power and solar power.
9 variables: A,B,C,D,E,F,X,Y,M
252 functions
See the online manual at
https://support.casio.com/en/manual/004/fx-300ESPLUS_EN.pdf
Has NTD (natural textbook display) which displays formulas and results as they appear in the textbook.
No cover.