---
product_id: 583310733
title: "OSALO Scientific Calculator 417 Function 2 Line 10+2 Digits Written Display Solar and Battery Calculators for Students Secondary School College Black (OS 991ES Plus 2nd Edition)"
brand: "osalo"
price: "AED 158"
currency: AED
in_stock: true
reviews_count: 13
category: "Osalo"
url: https://www.desertcart.ae/products/583310733-osalo-scientific-calculator-417-function-2-line-10-2-digits
store_origin: AE
region: United Arab Emirates
---

# dual solar & battery power 2-line written display 417 advanced functions OSALO Scientific Calculator 417 Function 2 Line 10+2 Digits Written Display Solar and Battery Calculators for Students Secondary School College Black (OS 991ES Plus 2nd Edition)

**Brand:** osalo
**Price:** AED 158
**Availability:** ✅ In Stock

## Summary

> 📐 Elevate your calculations, own every exam moment!

## Quick Answers

- **What is this?** OSALO Scientific Calculator 417 Function 2 Line 10+2 Digits Written Display Solar and Battery Calculators for Students Secondary School College Black (OS 991ES Plus 2nd Edition) by osalo
- **How much does it cost?** AED 158 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ae](https://www.desertcart.ae/products/583310733-osalo-scientific-calculator-417-function-2-line-10-2-digits)

## Best For

- osalo enthusiasts

## Why This Product

- Trusted osalo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Read Like a Textbook:** 2-line written display mirrors textbook notation for error-free input and instant verification.
- • **Power That Never Quits:** Dual solar and battery system ensures uninterrupted performance wherever your studies take you.
- • **Sleek, Portable Design:** Ultra-lightweight with a protective slide-on case—carry your calculator with confidence and style.
- • **Eye-Friendly Brightness:** Adjustable screen brightness reduces eye strain during marathon study sessions.
- • **Master Complex Calculations:** 417 functions covering algebra, statistics, matrices & more—your all-in-one academic powerhouse.

## Overview

The OSALO Scientific Calculator OS 991ES Plus 2nd Edition is a robust, feature-rich tool designed for students from secondary school to college. With 417 scientific functions, a dual-line written display for easy reading, and dual solar-battery power, it combines precision, reliability, and portability in a sleek black ABS plastic body. Perfect for mastering complex math and science coursework with confidence.

## Description

OSALO Scientific Calculator 417 Function 2 Line 10+2 Digits Written Display Solar and Battery Calculators for Students Secondary School College Black (OS 991ES Plus 2nd Edition): desertcart.co.uk: Stationery & Office Supplies

Review: Good Calculator - A simple and easy to use product which does the job for my daughter who has just started secondary school. I would recommend this for anyone else.
Review: Does exactly what you want it to do - Sturdy calculator. Doesnt feel cheap or anything which is great. Its very easy to use. Didnt take little getting used to but the instruction of the buttons on the inside of the case do massively help. Took this into my Level 2 Electrical exam and passed being able to comfortable answer all questions that had equations. Highly recommend

## Features

- 【417 Functions Scientific Calculator】With 417 functions for fractions, exponents, matrix calculations, statistics, integral, algebra, complex number calculations, standard deviation, solving for variables, permutations and combinations, and linear regression, Scientific Calculator covers most of the scientific functions that students from middle school through college will need to use in their courses and on exams. Reading instruction attached will help you know how to use and find these functions.
- 【Written Display Scientific Calculator】Input expressions and arithmetic operations same as written form in the textbook, which is more easy to read than traditional calculators. The 2 line display shows both input and calculation results,convenient for students to check the calculation process and results.
- 【Brightness Adjustment Function】The screen brightness can be adjusted by simple operation to get the best display effect, dimming to relieve eye fatigue, brightening to get clearer display results, to improve the calculation efficiency.
- 【Dual Power Source Electronic Calculator】Solar and battery,double safe uninterruptible power,environmental protection and energy saving advantages.
- 【Ultra-light & Portable】Weight: 5.1oz. (145g); Size: 164 x 80 x 17(mm)/6.4 x 3.15 x 0.6 7(inch); Material: ABS plastic. With slide-on hard case, convenient to carry it outside and hold it on one hand.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CJLC75XS |
| Best Sellers Rank | 8,316 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 29 in Scientific Calculators |
| Brand Name | OSALO |
| Calculator Type | Engineering/Scientific |
| Colour | black |
| Country of Origin | China |
| Customer Reviews | 4.4 4.4 out of 5 stars (705) |
| Display Type | LCD |
| Enclosure Material | Plastic |
| Item Dimensions L x W | 16.4L x 1.7W centimetres |
| Item Weight | 0.15 Kilograms |
| Manufacturer | Osalo co., ltd |
| Manufacturer Part Number | OSALO CO.,LTD. |
| Model Name | OS 991ES Plus 2nd Edition |
| Model Number | OS-991ES PLUS II |
| Number of Batteries | 1 LR44 batteries required. (included) |
| Power Source | Battery & Solar |
| Screen Size | 6 |
| UPC | 730637240479 |

## Product Details

- **Brand:** OSALO
- **Calculator Type:** Engineering/Scientific
- **Colour:** black
- **Display type:** LCD
- **Material:** Plastic
- **Model name:** OS 991ES Plus 2nd Edition
- **Number of batteries:** 1 LR44 batteries required. (included)
- **Power source:** Battery & Solar
- **Product dimensions:** 16.4L x 1.7W centimetres
- **Screen size:** 6

## Images

![OSALO Scientific Calculator 417 Function 2 Line 10+2 Digits Written Display Solar and Battery Calculators for Students Secondary School College Black (OS 991ES Plus 2nd Edition) - Image 1](https://m.media-amazon.com/images/I/71hSDGrjRzL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good Calculator
*by F***D on 19 January 2026*

A simple and easy to use product which does the job for my daughter who has just started secondary school. I would recommend this for anyone else.

### ⭐⭐⭐⭐⭐ Does exactly what you want it to do
*by M***E on 24 June 2025*

Sturdy calculator. Doesnt feel cheap or anything which is great. Its very easy to use. Didnt take little getting used to but the instruction of the buttons on the inside of the case do massively help. Took this into my Level 2 Electrical exam and passed being able to comfortable answer all questions that had equations. Highly recommend

### ⭐⭐⭐⭐ Cheaper than Casio but does the same
*by P***X on 26 July 2024*

Casio is the brand but it was about £10 more than this one and so far (last 6 months) this has functioned perfectly well and no issues at all. Definitely good value for money. Hope that helps.

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- OSALO Scientific Calculator 417 Function 2 Line 10+2 Digits Written Display Solar and Battery Calculators for Students Secondary School College Black (OS 991ES Plus 2nd Edition)
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*Product available on Desertcart United Arab Emirates*
*Store origin: AE*
*Last updated: 2026-05-27*