--- product_id: 580523649 title: "Scientific Calculator 401 Function 10+2 Digits Display Solar Battery Calculators Fraction Statistics Integral for Middle and High School College Students (OS 991MS 2nd Edition)" brand: "osalo" price: "£21.47" currency: GBP in_stock: true category: "Osalo" url: https://www.desertcart.co.uk/products/580523649-scientific-calculator-401-function-10-2-digits-display-solar-battery store_origin: GB region: United Kingdom --- # adjustable brightness display dual solar & battery power 401 advanced functions Scientific Calculator 401 Function 10+2 Digits Display Solar Battery Calculators Fraction Statistics Integral for Middle and High School College Students (OS 991MS 2nd Edition) **Brand:** osalo **Price:** £21.47 **Availability:** ✅ In Stock ## Summary > 📊 Elevate your study game with precision and style! ## Quick Answers - **What is this?** Scientific Calculator 401 Function 10+2 Digits Display Solar Battery Calculators Fraction Statistics Integral for Middle and High School College Students (OS 991MS 2nd Edition) by osalo - **How much does it cost?** £21.47 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/580523649-scientific-calculator-401-function-10-2-digits-display-solar-battery) ## 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 - • **Sleek & Portable:** Lightweight design with protective slide case fits perfectly in your backpack or hand. - • **See It All Clearly:** Dual-line display shows both input and results for error-free, efficient problem solving. - • **Power That Never Quits:** Solar plus battery power ensures uninterrupted performance wherever you go. - • **Eye-Friendly Brightness:** Customizable screen brightness reduces eye strain during marathon study sessions. - • **Master Every Calculation:** 401 versatile scientific functions from fractions to calculus cover all your academic needs. ## Overview The OSALO Scientific Calculator OS-991MS 2nd Edition offers 401 functions including advanced math and statistics, a dual-line 10+2 digit LCD with adjustable brightness, and dual solar-battery power for reliable use. Its ultra-light ABS plastic body with a slide-on case makes it ideal for middle school to college students seeking a durable, portable, and feature-rich calculator. ## Description desertcart.com : OSALO Scientific Calculator 401 Function 10+2 Digits Display Solar Battery Calculators Fraction Statistics Integral for Middle and High School College Students (OS 991MS 2nd Edition) : Office Products ## Features - 【401 Functions Scientific Calculator】With 401 functions for fractions, matrix calculations, statistics, calculus, complex number calculations, equation calculation, standard deviation, vector calculation, permutations and combinations, solar 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. - 【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. - 【2-Line Scientific Calculator】Input expressions and arithmetic operations is easier 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. - 【Dual Power Source Electronic Calculator】Solar and battery, double safe uninterruptible power, environmental protection and energy saving advantages. - 【Ultra-light & Portable】Weight: 4.97oz. (141g); 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 in one hand. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CJHSVYLN | | Best Sellers Rank | #44,550 in Office Products ( See Top 100 in Office Products ) #46 in Scientific Calculators | | Brand | OSALO | | Calculator Type | Engineering/Scientific | | Color | Black | | Customer Reviews | 4.3 4.3 out of 5 stars (33) | | Display Type | LCD | | Enclosure Material | Plastic | | Item Dimensions L x W | 6.4"L x 3.15"W | | Manufacturer | OSALO | | Mfr Part Number | OSALO CO.,LTD. | | Model Name | OS-991MS II | | Model Number | OS-991MS Ⅱ | | Number of Batteries | 1 LR44 batteries required. (included) | | Power Source | Battery & Solar | | Screen Size | 2.36 Inches | | UPC | 730637240455 | ## Product Details - **Brand:** OSALO - **Calculator Type:** Engineering/Scientific - **Color:** Black - **Power Source:** Battery & Solar - **Screen Size:** 2.36 Inches ## Images ![Scientific Calculator 401 Function 10+2 Digits Display Solar Battery Calculators Fraction Statistics Integral for Middle and High School College Students (OS 991MS 2nd Edition) - Image 1](https://m.media-amazon.com/images/I/71rsbxwvKwL.jpg) ## Available Options This product comes in different **Style** options. ## Frequently Bought Together - OSALO Scientific Calculator 401 Function 10+2 Digits Display Solar Battery Calculators Fraction Statistics Integral for Middle and High School College Students (OS 991MS 2nd Edition) - BIC Brite Liner Highlighters, Chisel Tip, 5-Count Pack of Highlighters Assorted Colors, Ideal Highlighter Set for Organizing and Coloring - Texas Instruments TI-30XIIS Scientific Calculator, Black with Blue Accents --- ## 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.co.uk/products/580523649-scientific-calculator-401-function-10-2-digits-display-solar-battery](https://www.desertcart.co.uk/products/580523649-scientific-calculator-401-function-10-2-digits-display-solar-battery) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-12*