Casio fx-991ES PLUS 2nd Edition Scientific Calculator

Casio fx-991ES PLUS 2nd Edition Scientific Calculator is an advanced, non-programmable scientific calculator designed for high school and university students, engineers, and scientists. Featuring 417 built-in mathematical functions, it supports complex calculations, equation solving, matrix/vector operations, differential and integral calculus, base-n calculations, and statistics. The calculator features a high-resolution Natural Textbook Display (Natural V.P.A.M.) that shows fractions, roots, and formulas exactly as they appear in standard textbooks for improved legibility. Built with a dual-power system (Solar and LR44 battery), it offers dependable performance under all lighting conditions. Additional key specs include a slide-on protective hard cover, rounded ergonomic design, and key wear resistance.