







🔬 Elevate your math game with precision and power — never miss a calculation!
The CATIGA991EX is a robust scientific calculator featuring 552 advanced functions ideal for high school and college STEM courses. It boasts a 32% larger high-resolution LCD screen for clear, textbook-style formula display, dual solar and battery power for reliable use, and a durable build supported by a one-year warranty and responsive customer care.







| Display Type | LCD |
| Power Source | Dual Powered |
| Screen Size | 3 Inches |
| Calculator Type | Engineering/Scientific |
| Item Dimensions L x W | 6.46"L x 3.15"W |
| Color | 7) 991-EX Black |
A**R
Gift for granddaughter
Granddaughter says it works wonderfully
8**L
Trigonometry and calculus.
If you’re doing Trigonometry or even calculus get this calculator, when it comes to inverse functions, it helps you so much because it gives you the number with a square root. If you did this on a T I 84 it would just give you decimal numbers instead of let’s say 1 over square root 3.
M**S
Excellent
Very good highly recommended
J**N
Great device for price
Is a great option for the price! So far has been useful for everything school required
D**0
Ready for school
Very simple to use well for my kid
R**S
Smart and cute
Ordered for my highschool student in Advanced geometry… now she is set up and she loves the color.
D**E
Scientific Calculator
Great Scientific Calculator
B**L
Simple and Effective Calculator
Very light and have various functions.Easy to use and value for money.
Trustpilot
2 weeks ago
2 weeks ago
2 weeks ago
2 months ago