Casio FX991EX Engineering/Scientific Calculator Black

It is Non-Programmable Scientific Calculator with 552 Functions

4-times better resolution than Casio 991ES Plus for easier viewing on long expressions
Natural Textbook Display- Input and display fractions, powers, logarithms, roots, and other mathematical formulas and symbol just as they appear in textbooks
Scientific Calculator with inbuilt QR Code function — QR Code feature generate graphical visualization of given equation in your smart device. It also helps you to access calculator user manual on your smart phone.
Faster than any previous Casio Non-Programmable Scientific Calculator
Up to Four Degree Simultaneous and Polynomial Solver
Numerical Integration, Differentiation, Statistics, Matrix, Vector Calculation
Colour coded keypad for easy key differentiation for Secondary and tertiary functions.
Dual Powered – Solar & Battery so that you can use for long time without the need of battery replacement
Attractive and elegant look with metallic keys