Original Casio fx-991ES PLUS 2nd Edition

The Casio fx-991ES PLUS 2nd Edition is a non-programmable scientific calculator designed to support a wide range of mathematical and scientific computations, making it ideal for students and professionals alike. 

Key Features:

• Extensive Functionality: Equipped with 417 functions, the calculator handles various operations, including basic arithmetic, trigonometry, statistics, integration, differentiation, complex numbers, matrices, and vectors.

• Natural Textbook Display: The calculator's display presents mathematical expressions and results as they appear in textbooks, enhancing comprehension and reducing input errors

• Dual Power Source: Utilizes both solar and battery power (LR44), ensuring reliable operation under different lighting conditions.

• High-Resolution Display: Features a dot matrix display that provides clear and precise visuals of calculations and graphs.

• User-Friendly Design: The calculator boasts a slim, ergonomic design with durable plastic keys, a protective hard case, and a layout that emphasizes ease of use.

• Memory Functions: Includes capabilities such as variable storage (9 variables), independent memory operations, answer memory, and a reset function for versatile calculation management.

• Auto Power Off: Incorporates an auto power-off feature to conserve battery life when the calculator is not in us

Specifications:

• Display: 10-digit mantissa + 2-digit exponential

• Dimensions: 161.5 × 77 × 11.1 mm

• Weight: Approximately 95 g

In summary, the Casio fx-991ES PLUS 2nd Edition combines extensive functionality with a user-friendly interface, making it a reliable tool for complex mathematical and scientific problem-solving.