--- product_id: 583310733 title: "– OSALO Scientific Calculator 417 Functions GCSE School Black OS-991ES PLUS 2" brand: "osalo" price: "237.11 DT" currency: TND in_stock: true category: "Osalo" url: https://www.desertcart.tn/products/583310733-osalo-scientific-calculator-417-functions-gcse-school-black-os-991es store_origin: TN region: Tunisia --- # dual solar & battery power 2-line textbook-style display 417 advanced functions – OSALO Scientific Calculator 417 Functions GCSE School Black OS-991ES PLUS 2 **Brand:** osalo **Price:** 237.11 DT **Availability:** ✅ In Stock ## Summary > 📊 Elevate your calculations, own every exam moment! ## Quick Answers - **What is this?** – OSALO Scientific Calculator 417 Functions GCSE School Black OS-991ES PLUS 2 by osalo - **How much does it cost?** 237.11 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/583310733-osalo-scientific-calculator-417-functions-gcse-school-black-os-991es) ## 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 Pro:** 2-line written display mirrors textbook notation for error-free input and easy result verification. - • **Sleek & Portable:** Ultra-light 145g design with a protective slide-on case fits perfectly in your bag or hand for on-the-go success. - • **Power That Never Quits:** Dual solar and battery power ensures uninterrupted performance wherever you study or work. - • **Eye-Friendly Brightness:** Adjustable screen brightness reduces eye strain during long study sessions or late-night crunch time. - • **Master Every Calculation:** 417 versatile functions from algebra to statistics cover all your academic and professional needs. ## Overview The OSALO Scientific Calculator OS-991ES PLUS 2 is a high-performance, 417-function calculator designed for students from middle school to college. Featuring a 2-line written display for easy input and result tracking, dual solar and battery power for reliability, and adjustable brightness to reduce eye fatigue, it combines portability and advanced functionality in a sleek, lightweight design with a protective case. ## Description OSALO Scientific Calculator 417 Functions GCSE School Black OS-991ES PLUS 2 | Math Scientific Calculator, 2-Line Written Display, Solar & Battery Power for GCSE, Secondary High School College: desertcart.co.uk: Stationery & Office Supplies ## 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 | 1,233 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 14 in Scientific Calculators | | Brand Name | OSALO | | Calculator Type | Engineering/Scientific | | Colour | black | | Country of Origin | China | | Customer Reviews | 4.5 4.5 out of 5 stars (759) | | Display Type | LCD | | Enclosure Material | Plastic | | Item Dimensions L x W | 16.4L x 1.7W centimetres | | Item Weight | 0.15 Kilograms | | Manufacturer | OSALO | | 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) | | Number of Items | 1 | | 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 Functions GCSE School Black OS-991ES PLUS 2 - Image 1](https://m.media-amazon.com/images/I/71hSDGrjRzL.jpg) ## Available Options This product comes in different **Style** options. ## Frequently Bought Together - 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) - BIC 4 Colours Original Pens, Multi Coloured Pens All In One, Biro Pens, Medium 1.0mm, Green, Blue, Red, Black, 3 Pens Per Pack, 1 Pack - Zamasha Clear Pencil Case Black | 22x4x9 cm Stylish, Practical and Transparent Pencil Case | Versatile Storage for Stationery, Toiletries, Makeup, Travel & Office Supplies --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/583310733-osalo-scientific-calculator-417-functions-gcse-school-black-os-991es](https://www.desertcart.tn/products/583310733-osalo-scientific-calculator-417-functions-gcse-school-black-os-991es) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-15*