Casio fx-991CW Original

✅ Overview & Authenticity

The fx‑991CW is a second-generation ClassWiz scientific calculator introduced internationally in 2022. It features a high-resolution 192×63 pixel display with 4‑tone grayscale, designed for ease of reading and navigation.eBay+12CASIO WEW Worldwide Education Website+12Casio+12Wikipedia+1

Casio provides a built-in authenticity check: go to HOME → SETTINGS → OPTN to generate a QR code showing a 20-digit calculator ID. You can verify this on Casio’s official site to confirm the calculator is genuine.CASIO WEW Worldwide Education Website

🧮 Key Features & Specifications

• 540+ built-in functions, including advanced algebra, calculus, matrix/vector, complex numbers, spreadsheet, statistical regression, equation solving, probability, and more.Accelerator

• Natural Textbook Display shows expressions as they appear in textbooks.

• Math Box for fun learning simulations like dice rolls and coin tosses.

• Spreadsheet mode supports up to 5 columns × 45 rows (maximum of ~170 data items).CASIO WEW Worldwide Education Website+10Casio Education+10garnerstationery.com+10garnerstationery.com+8Casio+8Casio+8

• Equation app includes simultaneous and polynomial solvers up to 4 variables or 4th degree.

• C‑catalogue & TOOLS menu, cursor navigation, and improved key layout vs older ClassWiz models.Wikipedia+1Wikipedia+12CASIO WEW Worldwide Education Website+12Wikipedia+12

• High-precision calculation engine: up to 23-digit internal precision and 60-bit floating point.Wikipedia+1

• Dual power: solar cell + LR44 battery ensures long-lasting power.compsource.com+1

• Dimensions: approximately 162 × 77 × 10.7 mm, weight around 90 g.Accelerator

📌 Is It the “Original”?

If you're looking for the officially released black fx‑991CW, this is it—not a clone or older fx‑991EX or ES. Look for the CW logo and 4‑level display. The packaging may not always carry holograms, but the calculator itself will generate a QR code for authenticity checking.YouTube+12CASIO WEW Worldwide Education Website+12CASIO WEW Worldwide Education Website+12

✅ Summary Table

🎥 Want to See It in Action?

You can find YouTube unboxing and review videos that walk through its interface, function menus, Math Box, and real‑use examples. Search “Casio fx‑991CW review” or similar terms—very useful if you're verifying a purchase or learning to use it.WikipediaAmazonCASIO WEW Worldwide Education Website+14YouTube+14Amazon+14

📝 Final Thoughts

The Casio fx‑991CW ClassWiz is a fully featured, exam‑friendly scientific calculator built for clarity, speed, and functionality. If you’re buying it, ensure it's the CW—not a previous EX/ES variant—by checking its display style, CW labeling, and performing the QR‑based authenticity test. Let me know if you need help using any specific functions or distinctions between models!