FX-991ES Plus CTIFREE Scientific Calculator Heavy Duty Engineering Calculator For High School University Students Office

Digital Scientific Calculator. Advanced design allows you to enter more than one calculation, quickly compare results, and explore patterns, all on the same screen.

Multifunctional Calculator. A total 417 functions include fractions, statistics, complex number calculations,  standard deviation, trigonometric, permutations, and variable solving.

Suitable for all Levels. Can meet the learning purpose of high school and college level courses including generic math and science, pre-algebra, algebra I/II, geometry, statistics, pre-calculus, trigonometry, chemistry, physics, and also a portable accounting calculator for home and business use.

Wear-Resistant. Designed with a hard plastic cover and comfort set buttons, protective and wear-resistant. Contrasting buttons and a large LCD display make calculations faster and reduce mistakes.

Dual Power Supply. Solar power with LR44 battery backup never worries about running out of power. Its memory function allows full-length functions and operations to be displayed and saved, convenient to check the accuracy of each accounting step.

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