--- product_id: 50525484 title: "FX-991DE X." brand: "casio" price: "$147.63" currency: USD in_stock: true reviews_count: 13 category: "Casio" url: https://www.desertcart.ec/products/50525484-fx-991de-x store_origin: EC region: Ecuador --- # 4x faster processor 192x63 high-res display 4x4 matrix & 4th order equations FX-991DE X. **Brand:** casio **Price:** $147.63 **Availability:** ✅ In Stock ## Summary > 📈 Elevate your calculations—where precision meets innovation! ## Quick Answers - **What is this?** FX-991DE X. by casio - **How much does it cost?** $147.63 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/50525484-fx-991de-x) ## Best For - casio enthusiasts ## Why This Product - Trusted casio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Crystal-Clear Display:** Experience ultra-sharp visuals with a 192x63 pixel LCD, quadrupling clarity for effortless data reading. - • **Advanced Equation Solver:** Solve up to 4th order equations and 4x4 matrix systems with ease—perfect for next-level problem solving. - • **Power-Packed Performance:** Blaze through complex calculations with a processor 4 times faster than previous models—no lag, just results. - • **Smart QR Code Integration:** Instantly convert results into QR codes to visualize graphs and data on your smartphone—seamless tech synergy. - • **Comprehensive Scientific Toolkit:** Access 47 updated constants, 164 unit conversions, and advanced distribution & regression functions—all in one sleek device. ## Overview The Casio FX-991DE X is a cutting-edge scientific calculator featuring a high-resolution 192x63 pixel display, a processor four times faster than its predecessor, and advanced capabilities including solving 4th order equations and 4x4 matrices. It integrates a unique QR code function for instant data visualization on smart devices, supports extensive scientific constants and unit conversions, and offers enhanced spreadsheet-like calculations and regression analysis, making it the ultimate tool for professionals and students seeking precision and efficiency. ## Description Casio FX-991DE X Review: Thank You desertcart EU! Genuine! Reasonable price! - I’m from the UK and finally got a genuine Casio fx-991EX! Brand new! With RRP! It’s worth it to learn some German instead of paying for a vintage model of calculator at an inflated price. I’m extremely happy with my purchase! This order made my day! After purchasing several fake ones and a damaged second hand one.🌟🌟🌟🌟🌟 Review: It does good math - It does math. ## Features - Casio FX-991DE X ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00VB2ISDM | | Best Sellers Rank | 196,163 in Fashion ( See Top 100 in Fashion ) 1,295 in Men's Wrist Watches | | Brand | Casio | | Brand Name | Casio | | Calculator Type | Engineering/Scientific | | Colour | black | | Compatible Devices | Casio FX-991DE X | | Customer Reviews | 4.6 out of 5 stars 26,306 Reviews | | Display Type | LCD | | EU Spare Part Availability Duration | 7 Years | | Enclosure Material | Plastic | | Global Trade Identification Number | 04549526611865 | | Item Dimensions L x W | 16.6L x 7.7W centimetres | | Item Type Name | CASIO FX-991DEX Scientific ClassWiz Calculator | | Item Weight | 0.09 Kilograms | | Manufacturer | CASIO | | Manufacturer Part Number | FX-991DE X | | Model Name | Ohne Print | | Model Number | FX-991DE X | | Number of Batteries | 1 CR123A batteries required. (included) | | Number of batteries | 1 CR123A batteries required. (included) | | Power Source | Battery Powered | | Power source | Battery Powered | | Product Warranty | 12 | | Screen Size | 7.9 Centimetres | | Screen size | 7.9 Centimetres | | Unit Count | 1.0 count | ## Product Details - **Brand:** Casio - **Calculator Type:** Engineering/Scientific - **Colour:** black - **Compatible devices:** Casio FX-991DE X - **Material:** Plastic - **Model name:** Ohne Print - **Number of batteries:** 1 CR123A batteries required. (included) - **Power source:** Battery Powered - **Product dimensions:** 16.6L x 7.7W centimetres - **Screen size:** 7.9 Centimetres ## Images ![FX-991DE X. - Image 1](https://m.media-amazon.com/images/I/71dGAKOpgVL.jpg) ![FX-991DE X. - Image 2](https://m.media-amazon.com/images/I/71i4l-EjEsL.jpg) ![FX-991DE X. - Image 3](https://m.media-amazon.com/images/I/71pLJA19fVL.jpg) ![FX-991DE X. - Image 4](https://m.media-amazon.com/images/I/71uCZCeh3wL.jpg) ![FX-991DE X. - Image 5](https://m.media-amazon.com/images/I/71n2y-b8amL.jpg) ## Questions & Answers **Q: Can you change the language to English?** A: No, there is no option to change the language, try the 991 EX. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Thank You Amazon EU! Genuine! Reasonable price! *by L***N on 13 April 2026* I’m from the UK and finally got a genuine Casio fx-991EX! Brand new! With RRP! It’s worth it to learn some German instead of paying for a vintage model of calculator at an inflated price. I’m extremely happy with my purchase! This order made my day! After purchasing several fake ones and a damaged second hand one.🌟🌟🌟🌟🌟 ### ⭐⭐⭐⭐⭐ It does good math *by A***R on 29 May 2025* It does math. ### ⭐⭐⭐⭐⭐ 😊 *by V***K on 11 October 2024* 😊 ## Frequently Bought Together - Casio FX-991DE X (German) - Zamasha Clear Pencil Case Black | 22x4x9 cm Stylish, Practical and Transparent Pencil Case | Versatile Storage for Stationery, Toiletries, Makeup, Travel & Office Supplies - Casio fx-991CW Advanced Scientific Calculator (UK Version) --- ## 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.ec/products/50525484-fx-991de-x](https://www.desertcart.ec/products/50525484-fx-991de-x) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-07-14*