🔬 Elevate your calculations—where precision meets power!
The SS-991EX is a scientific calculator equipped with 552 advanced functions including calculus, matrix, and statistical operations. It features a 32% larger high-resolution display that presents formulas as in textbooks for enhanced clarity. Powered by both solar energy and battery backup, it guarantees uninterrupted use. Built with durable materials and backed by a 365-day warranty, it’s designed for high school, college, and professional STEM users seeking reliable, precise computation.
| 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 |
B**R
Calculater
It is easy to use ,it has a good introduction booklets. I highly recommend it
M**S
Very child-friendly
Barbie pink scientific calculator whose scientific functions are so easy to use that my Small Person uses it without issue. The screen is a good size and it feels like decent quality.
G**D
There are better programmables around
Got this out of nostalgic curiosity for the days before use of calculators in schools shunted programmability to top end professional devices. AFAI can make out it is similar to the old Casio fx-6300g kit.Pleasant for taking me on a trip down memory lane but these days, if you want a programmable device, then I think you're better off getting a top-of-the-line model from one of Casio, HP, Sharp or TI. (I use an HP50g, which beats the pants off this Catiga offering.)It's minor saving grace is that it's probably the cheapest programmable you can buy.
J**I
LIFE SAVER!!
I used this calculator for my maths GCSE. The graph questions always get me confused. This answered the questions and drew the graphs and literally SAVED my education. Expensive? Yes but worth it? 100%
M**E
Instructions are not straightforward
I got my calculator today and noticed the display was a bit faint, so I decided to change the brightness man I didn't know what I was getting myself into it's like a thick wall not really answering you very well that booklet. You can't change brightness on the machine, nor does it come with alternate formats for fractions such as math0 as well as the buttons are pretty slippery compared to Casio calculators
F**U
CATIGA calculator can make graphics, can solve equations in graphic mode
CATIGA calculator can make graphics, can solve equations in graphic mode, you can make programable formulas with 8 variables, can solve numeric integrals, Simpson method, the booklet which came with the calculator explains everything
Trustpilot
4 days ago
3 weeks ago
