Casio FX991EX Classwiz Scientific Calculator ( Black/Pink/Blue, Solar Power)

Solar & Battery : Solar powered when light is sufficient, battery powered when light is insufficient. Scientific Constants : You can use constant

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

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Casio Authentic FX-991EX Engineering/Scientific Calculator, Black with 522 functions BLACK , PINK & BLUE

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Casio FX-991EX Advanced Scientific Calculator, High Resolution Screen, Black