This is my first scientific calculator, how hard is it to learn?

Most scientific calculators share the same underlying logic. Once you understand the core concepts, switching between models is easy — the icon-menu layout here makes that transition even smoother.

I need this to last through several years of school. Is it durable?

Yes. The casing and keys are built to hold up to daily use — tossed in a backpack, pulled out between classes, used every day for years.

Can it handle statistics and table-based problems, not just basic arithmetic?

Yes. It includes dedicated statistics and table modes for regression, data analysis and function tables, on top of standard scientific calculations.

How long does the battery last, and what if I run low mid-exam?

It runs on dual power — as long as there's reasonable light it keeps working even if the battery is low.

Is this calculator suitable for exam prep?

It's built to support the full range of practice you'll do while preparing. As with any calculator, permitted equipment varies by exam board, so check your specific exam's guidelines as part of your prep.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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CATIGA Black Scientific Calculator with Textbook-Style HD Display, Solar & Battery Scientific Calculators for College, High School & Engineering Students, Icon Menu & Magnetic Hard Case, CS-991NX

Product ID: 105218503

Details

Brand
CATIGA
Calculator Type
Color
Black
Number of Batteries
1 Nonstandard
Power Source
Solar and

📺HD Textbook-Style Display

🔋Dual Solar + Battery Power

🧲Magnetic Hard Case

176.86 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

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Description

📐 Master every equation with clarity and confidence—your ultimate study sidekick!

UNSTOPPABLE POWER COMBO - Solar-powered with battery backup means zero downtime during critical tests—always exam-ready.
SLIM LIGHT EXAM READY - Compact 0.21 lbs design fits effortlessly in your bag, with durable keys built for years of daily use.
SEE MATH LIKE YOUR TEXTBOOK - Crisp 4-gradation HD display shows fractions, roots, and equations exactly as written—no more decoding flat lines.
BUILT TO SURVIVE YOUR BACKPACK - Rigid magnetic snap-on hard case stays secure and protects your calculator through every commute and exam.
ALL IN ONE SCIENTIFIC POWERHOUSE - 538 functions covering everything from Algebra to Engineering—ditch the second calculator forever.

The CATIGA CS-991NX scientific calculator features a high-resolution textbook-style LCD display, 538 versatile functions for math and science, and a durable magnetic hard case. Powered by solar energy with battery backup, it ensures uninterrupted use during exams. Its slim, lightweight design is tailored for students from high school to engineering, making it a reliable, all-in-one tool for complex calculations and test day readiness.

Specifications

ASIN	B0H75MY3G7
Best Sellers Rank	#9,608 in Office Products ( See Top 100 in Office Products ) #25 in Scientific Calculators
Brand	CATIGA
Calculator Type	Engineering/Scientific
Color	Black
Customer Reviews	4.6 4.6 out of 5 stars (602)
Display Type	LCD
Item Dimensions L x W	6.5"L x 3.25"W
Manufacturer	CATIGA
Mfr Part Number	991NX
Model Name	CS-991NX
Model Number	CS-991NX
Number of Batteries	1 Nonstandard Battery batteries required. (included)
Number of Items	1
Power Source	Solar and Battery Powered
UPC	810185461714
Warranty Description	1-Year Limited Manufacturer’s Warranty

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176.86 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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