The Casio FX-991ES Scientific Calculator is a handheld device that powers up using a combination of battery and solar energy. This sleek calculator, known for its reliability and durability, is designed for office and industrial use. With its scientific capabilities and Casio brand reputation, it is an essential tool for those who require precise calculations on the go. The model FX-991ES is a popular choice for professionals and students alike who need a dependable calculator for everyday tasks.
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