Refurbished) Casio FX-991EX Scientific Calculator (Black) : : Office Products

Multifunctional function calculator, special scientific calculator for students' examination,FX-991EX Classwiz Non-Programmable Scientific Calculator, 240 Functions

Casio FX-991ES Plus Repair - iFixit

Casio fx-991ES Plus Scientific Calculator

This solar scientific calculator comes with a highly efficient solar panel that requires only 50 lux, works with any available light. Will never need batteries. 10 digit LCD + 2 digit exponent. 15 levels of parenthesis. 67 functions including all the preprogrammed functions of Large Display Scientific Calculator 830003 plus; binary, octal decimal, sexagesimal, and hexadecimal conversion, and standard deviation.

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