{"@context":"https://schema.org/","@type":"Product","name":"OSALO Scientific Calculator For Students - (OS-991ES PLUS)","description":"

Specification
Title:	OSALO Scientific Calculator For Students
Brand:	OSALO
Warranty Period	12 Months
Country of Origin	China
Number Of Digit	12 Digit
Features	Dual Power Supply Basic calculation 9 Variable memories Function calculation Statistical calculation
Dimensions	162 * 80 * 14 mm.
Model	OS-991ES PLUS.
Display Type	LCD Display.
Power Type	Solar and Battery.
Material	Plastic.
Battery Type	Solar Powered.
Product Weight	124 Grams.
Number of Functions	40 Scientific Constants 40 Metric Conversions
Display Size	Large.
Auto Power Off	Yes

Summary

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

417 Integrated Functions: Processes matrix, vector, and statistical analysis with 9 variable memories. Solves equations instantly during high-stakes engineering exams.
Natural Textbook Display: Shows fractions and square roots exactly as they appear in textbooks. Stops calculation errors during multi-step math problems.
Scientific Constants and Conversions: Includes 40 built-in constants and 40 metric conversion pairs. Removes the need for external paper reference tables.
Dual Power Source: Combines solar panels with an LR44 backup battery cell. Maintains display visibility even under dim indoor lighting.
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.

","image":["https://www.wafilife.com/2026/06/osalo-scientific-calculator-for-students-os-991es-plus-106417-250x250.jpg"],"sku":"106417","mpn":"106417","brand":{"@type":"Brand","name":"Osalo"},"category":"Calculator","offers":{"@type":"Offer","url":"https://www.wafilife.com/osalo-scientific-calculator-for-students/pd/106417","priceCurrency":"BDT","price":"795","availability":"https://schema.org/InStock","itemCondition":"https://schema.org/NewCondition","seller":{"@type":"Organization","name":"Wafilife","url":"https://www.wafilife.com"}},"publisher":{"@type":"Organization","name":"Osalo"}}

Specification

Summary

Key Features

Frequently Asked Questions

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

How to change battery in OSALO calculator?

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

Share in social network

আরো দেখুন…

Citiplus Glass Key Series Electronic Calculator - GT-99

Citiplus Scientific Series Electronic Calculator - SX-991MS

Citiplus Glass Key Series Electronic Calculator - SDC-3512

রিভিউ এবং রেটিং

গ্রাহক প্রশ্নোত্তর

Make your online shop easier with our mobile app