The Osalo OS-991ES PLUS is an advanced scientific calculator designed for high school and university students. It features a "Natural Textbook Display" that allows users to input and view mathematical expressions exactly as they appear in textbooks. Equipped with dual power sources, it ensures reliable performance for complex mathematical tasks.
Key Features:
417 Functions: Covers a wide range of mathematical needs including calculus, statistics, and vector analysis.
Natural Display: Shows fractions, roots, and exponents as written in books.
Two-Way Power: Solar powered with battery backup for continuous operation.
10+2 Digits: Large, clear display for easy reading of results.
Protective Case: Includes a slide-on hard cover to protect the keys and screen.
