OSALO Scientific Calculator For Students - (OS-991ES PLUS)

OSALO OS-991ES PLUS processes 417 functions using a natural textbook display. Under low light, dual power sources combine solar cells with an LR44 battery for data retention. This tool calculates complex matrix and vector equations during long engineering exams.

Key Features

1. 417 Integrated Functions: Processes matrix, vector, and statistical analysis with 9 variable memories. Solves equations instantly during high-stakes engineering exams.
2. Natural Textbook Display: Shows fractions and square roots exactly as they appear in textbooks. Stops calculation errors during multi-step math problems.
3. Scientific Constants and Conversions: Includes 40 built-in constants and 40 metric conversion pairs. Removes the need for external paper reference tables.
4. Dual Power Source: Combines solar panels with an LR44 backup battery cell. Maintains display visibility even under dim indoor lighting.
5. 12-Month Warranty: Covers manufacturing defects and internal hardware failures for one year. Guarantees hardware reliability for HSC student supplies.

Frequently Asked Questions

Is OSALO OS-991ES PLUS allowed in board exams?

Most boards permit non-programmable calculators with 417 functions for mathematics. The device lacks text-storage capability, meeting standard exam criteria.

How to change battery in OSALO calculator?

Remove the back cover screws to access the LR44 battery compartment. Replace the cell once the display dims in low-light environments.