Casio FX991CW

Overview

The Casio FX991CW is an advanced scientific calculator designed for students, engineers, and professionals who require precise mathematical tools. It features a high resolution display that presents equations in natural textbook format, making it easier to follow complex expressions without confusion. With 552 built-in functions, it supports a wide range of calculations from basic fractions to calculus, including numeric differentiation and definite integration. The calculator is powered primarily by ambient light with an LR44 battery backup, ensuring reliable use during exams and study sessions.

Key features

• High resolution display that clearly shows spreadsheets, matrices, and long expressions to reduce errors
• Natural textbook format for input and results, helping users avoid transcription mistakes
• Extensive function set covering fractions, statistics, calculus, and vector operations for versatile use
• Numeric differentiation and definite integration accessible with a single key press for advanced calculations
• Solar power supplemented by an LR44 battery to maintain performance in various lighting conditions
• Rounded keys and a four-way cursor that enhance navigation speed and comfort during data entry
• Memory storage for up to nine variables that remain saved between sessions for continuity
• QR code integration linking to ClassPad.net for instant graph visualization on mobile devices
• Approved for use in GCSE and A Level examinations, meeting academic requirements
• Protective hard case that slides over the front or back to safeguard the calculator during transport

Key specs

• Functions: 552 built-in mathematical functions
• Display: High resolution screen with natural textbook format
• Memory: Stores up to nine variables between sessions
• Power: Solar powered with LR44 battery backup
• Input: Rounded keys with four-way cursor for efficient navigation
• Compatibility: Approved for GCSE and A Level exams

Connectivity and compatibility

The FX991CW offers a unique QR code feature that connects your calculations to ClassPad.net, allowing you to view graphs and visual data on your smartphone or tablet quickly. This integration supports a seamless transition between handheld calculations and digital graphing tools, enhancing study and presentation workflows.

Ideal uses and environments

This calculator fits well in academic settings, especially for students preparing for GCSE and A Level exams. It also suits engineers and professionals who need reliable tools for complex mathematical tasks such as calculus and statistics. Its solar power with battery backup makes it dependable for long study sessions or exam environments where power sources may be limited.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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