Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Calculators
Origin	-
Brand	CASIO
Model Number	fx-991CN X (2026 New Model)
Display Type	High-resolution LCD with Natural Textbook Display
Language Interface	Simplified Chinese
Power Source	Solar Panel + Button Battery (LR44)
Functions Count	552+ Integrated Functions
Exam Compliance	Approved for Gaokao and Graduate Entrance Exams
Dimensions	165.5 x 77 x 11.1 mm
Weight	Approx. 105g (including battery)
Warranty	1 Year Manufacturer Warranty

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Perfect for Gaokao Preparation

This calculator is exactly what I needed for my high school exams. The Chinese interface makes it very easy to navigate complex functions, and the screen is crisp and clear even in bright light.

Anonymous

Mar 29, 2026

Rating: 5/5

Upgrade from the old 991ES

The new 2026 model feels much more responsive. The menu system is intuitive, and solving matrix equations is significantly faster than on my old calculator. Highly recommended for engineering students.

Anonymous

Mar 28, 2026

Rating: 5/5

Genuine Product, Fast Shipping

Verified the serial number on the Casio website, and it is 100% genuine. The packaging was secure, and the calculator came with a protective hard case. Very satisfied with this purchase.

Anonymous

Mar 20, 2026

Rating: 4/5

Good value for the price

Does everything advertised. The solar charging works well, so I haven't had to worry about battery life. Only minor issue is that the manual could be more detailed for advanced statistical features.

Anonymous

Mar 07, 2026

Rating: 4/5

Great features, slight learning curve

The functionality is incredible for physics competitions. It took me a day to get used to the new icon-based menu, but once I did, calculations became effortless. The build quality is solid as expected from Casio.

Anonymous

Mar 04, 2026

Rating: 5/5

Essential for College Math

I bought this for my calculus and statistics courses. The ability to solve integrals and display results in natural textbook format saves me so much time during homework and exams.

5 FAQ

Q: Can the language be switched to English?

A: No, this specific model is the Chinese version (CN X) and the system language is fixed to Simplified Chinese. Please look for the international 'EX' series if you require an English interface.

Q: Is this calculator allowed in the Chinese Gaokao exam?

A: Yes, the fx-991CN X is fully compliant with Gaokao regulations as it does not have graphing capabilities or programmable memory that violates exam rules.

Q: How do I reset the calculator if I make a mistake in settings?

A: You can perform a full initialization by pressing [SHIFT] -> [9] (Reset) -> [3] (All Data) -> [Yes]. This will restore all factory defaults.

Q: Is this the 2026 new model or an older version?

A: This is the latest 2026 new model (fx-991cncw), featuring updated processing speed and an improved high-resolution display compared to previous generations.

Q: Does it come with a protective case?

A: Yes, the package includes a durable slide-on hard case designed specifically for the fx-991CN X to protect the screen and buttons.

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