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iPepul

Scientific Calculators, IPepul Math Calculator with 417 Function, Solar Battery Power and 4-Line Display, School Supplies for Middle High College Students Teachers(991ES Plus)

    • Based on 36 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, May 20
Order within 15 hours and 38 minutes
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Features

  • 417 Calculation Functions: The scientific calculators has 417 different calculation function built-in, including trigonometric function, exponential function, logarithmic function, calculus, statistics, algebra, and other advanced mathematical functions. It also supports complex number calculations, matrix calculations, vector calculations, etc., and can meet the various scientific and engineering calculation needs.
  • Large Screen Four-Line Display: The scientific calculator adopts a four-line large screen design, which is convenient for users to read. It also supports the natural display, which can directly display the input and output of mathematical formulas on the screen, making complex calculations more intuitive.The key SHITT -MODE (SETUP) -6(Continue).Use and to adjust screen brightness.
  • Dual Power: This calculator has a built-in solar panel and durable battery, which can be used continuously for many years in indoor and outdoor environments, reducing the frequency of battery replacement and making it more economical. This also makes it the best choice for people who need to use it for a long time, such as school supplies, high school students, accountants, and non-programmable calculators.
  • Multi-Functional Keyboard: The calculator has a keyboard with many scientific symbols and function keys built-in, making it easy to perform various calculations and functions. Especially for people who need to perform scientific calculations frequently, this keyboard design can greatly improve their calculation efficiency, such as teachers, engineers, college students, nurses, and accountants.
  • The Best Gift: This calculator is very suitable for students in elementary school, junior high school, high school, college, engineers, nurses, and teachers, etc. It can meet their calculation needs in the fields of mathematics, science, and engineering, and help them better understand and apply knowledge. Therefore, as a gift, it can be given to these people who need to perform scientific calculations.CONTACT US FOR ELECTRONIC USERS GUIDE.

Package Dimensions: 6.61 x 3.43 x 0.75 inches


Item Weight: 5.3 ounces


Item model number: 991ES


Batteries: 1 LR44 batteries required. (included)


Date First Available: March 2, 2023


Manufacturer: ipepul


Country of Origin: China


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, May 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Nice
Color: 991ES PLUS
It works really good! Super easy to use.
Reviewed in the United States on September 6, 2023 by Roxana Rivera
    • ABSOLUTE BANG FOR YOUR BUCK
Color: 991ES PLUS
Needed a calculator for the supply list for my child. Serves its purpose.
Reviewed in the United States on August 13, 2023 by GREGORY
    • Nice calculator, especially for the price
Color: 991ES PLUS
Review Image by Louie DC Louie DC
Review Image by Louie DC Louie DC
I got this calculator because I had misplaced my Casio. When I got it I noticed that the layout looked very familiar. Then I found my Casio and found out that this is a functional clone of the Casio fx-300ES (see photo), which sells for much more. This calculator works great and has all of the same features as the Casio. the screen is slightly smaller than the Casio, but it's still large and clear. The solar panel is real and actually works. The only reason I did not give this 5 stars is because the buttons feel cheaper and the writing on the calculator has started to scratch off. Otherwise, a great calculator for the money. ... show more
Reviewed in the United States on September 11, 2023 by Louie DC Louie DC
    • Impressive features, very cheap construction.
Color: 991ES PLUS
Review Image by Posigrade Posigrade
Review Image by Posigrade Posigrade
Review Image by Posigrade Posigrade
Review Image by Posigrade Posigrade
First thing I did was check to make sure the solar panel is real (it is), as they're often faked. I pulled out the battery, and sure enough the calculator functioned when there was enough light on the panel, no battery installed at all. That means that the battery is very likely to last a very long time, as the panel will provide most of the power needed. One of the battery's wires though had been carelessly placed over the top of the battery, requiring me to pull the whole calculator apart to move the wire so that I could pull the battery. So much for the QC sticker. With that done I began to really start digging in. I am not impressed at all with the build quality. It just screams "as cheap as possible." The ink silkscreen is poorly done. It's very unfortunate, given how impressive the functionality is. I do suppose however that's how they hit this price point with this much functionality. The instruction booklet is a paper that unfolds, printed on both sides. They are written in (or translated to) good English and easy to read. I really love that it fits very neatly between the case cover and the calculator, meaning that the instructions can be carried with the calculator to they are on hand when they need to be referred to. All this is a huge plus, because there's no way I'm going to be memorizing all that. Good documentation is a giant part of any product, especially something like a scientific calculator- so this is a massive win on that front. The software is not quite as refined as higher end calculators, which is not shocking. It is however absolutely full-featured. One of the primary reasons I was interested in this one is because it has an algebraic solver program, something that my nSpire calculator is maddeningly missing, and something I use all the time on my TI89. The solver program is not difficult to use, and permits the same equation to be run repeatedly with new variables, something I seriously like. It's very usable for me. While in my photo the solver fails to recognize the correct answer is +/- 2, so does my TI89's solver program. The solver program is a huge win for me. So much so I like this calculator better than my nSpire. I'm very impressed with the calculator itself, and the documentation. Would be absolute 5 stars if it wasn't so glaringly cheaply built. ... show more
Reviewed in the United States on June 17, 2023 by Posigrade Posigrade
    • Scientific Calculator, IPepul Math Calculator w/ 417 Function, Solar Battery Power & 4-Line Display
Color: 991ES PLUS
Review Image by Master of Puppets Master of Puppets
Review Image by Master of Puppets Master of Puppets
Review Image by Master of Puppets Master of Puppets
Review Image by Master of Puppets Master of Puppets
I ordered this item mainly to take advantage of it's ability to be solar powered. I mainly wanted something to take with me to the grocery store to help me keep track of what I'm buying will cost me. This calculator is far more capable then that though and would make a great tool for your High School or College student to have in their book bag. ... show more
Reviewed in the United States on September 8, 2023 by Master of Puppets Master of Puppets
    • Horrible
Color: 991ES PLUS
First off, when I got the device the words were faded and there were scratches all over it. And then I get to class and it doesn't even work. I tried fixing it and so did the teacher, still doesn't work. Waste of money even if it was cheap.
Reviewed in the United States on August 31, 2023 by Krystal
    • School ready
Color: 991ES PLUS
This Scientific Calculator is a great option if you aren't able to buy the Texas Instrument one. I like that it is easy to learn the functions and works great. The cover protects the calculator and makes it easy to store also.
Reviewed in the United States on September 5, 2023 by Dominique Frank
    • Fantastic Value For $10-$11; Same Exact Calculator As Casio FX-991ES Plus Scientific Calculator!
Color: 991ES PLUS
Review Image by S. A. Dedio S. A. Dedio
Review Image by S. A. Dedio S. A. Dedio
So many scientific functions makes this calculator a good choice for families/students that are cost-conscious. This is a CLONE of the Casio FX-991ES Plus Scientific Calculator! It has the exact same functions, keys and look and feel & color. Don't worry about functionality--this has all a math/science student will need. I love the metric conversion functionality too. Truly solar and if handled with care, should last a long time. Metal casing (outside) part of front-not buttons, seems cheap and had a couple of nicks on the metal--not a big deal but odd. The manual is readable and was edited for the U.S. market--keep it handy but (Pro tip) know that you can find a PDF of the Casio manual online and it will serve you well! I'm shocked this item is exactly the same as the Casio, just missing the Casio logo and branded box & material! ... show more
Reviewed in the United States on July 30, 2023 by S. A. Dedio S. A. Dedio

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