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ROATEE

Upgraded 991ES Plus Desktop Scientific Calculator, ROATEE Multiview 4-Line Display with Erasable LCD Writing Tablet, Solar Battery Power with Notepad for School

    • Based on 540 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Nov 24
Order within 47 minutes
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Color: 991 ES


Features

  • [991ES Multifunctional Scientific Calculator] - ROATEE business calculator features 417 computing functions, which is more than the common scientific calculator on the market. And this can meet almost all of your daily computing needs.
  • [Scientific Calculator with Notepad] - This scientific calculator for students intergrates calculation and notebook with a stylus pen. The lcd writing tablet enables you to take notes during the calculation, which do great help for study and work. Great portable high school supplies! NOTEOnly Unlock the LOCK KEY will the writing area and the erase button work.
  • [Dual Power Solar Panel & Coin Battery] - The replaceble coin battery is built in this scientific calculator. It is also powered by solar energy so you don't need to worry about battery depletion.
  • [Anti-Drop Body with High Durability] - The body of this scientific calculator undergoes rigorous quality tests. Due to the design of anti-drop body, no need to worry about the damage by accidentally falling.
  • [Lightweight and Portable Design] - This lightweight scientific calculator only weighs 5 ounces.It can be easily put in your pocket, which is convenient for business and college.
  • [Conversion of Fraction and Decimal] - You can change the results through the key 'SD'; Or you can configure calculator setting: 1. Press the button 'SHIFT'. 2. Press the button 'MODE'. 3. Choose 1 or 2 to set the mode of fraction or decimal. MthIO for fraction, LineIO for decimal
  • [What Will You Get?] - 991ES scientific calculator*1,instructions*1,exquisite packing box*1,packing case*1.

Brand: ROATEE


Color: 991 ES


Calculator Type: Business


Power Source: Battery Powered


Screen Size: 6.5 Inches


Product Dimensions: 6.97 x 3.74 x 0.04 inches


Item Weight: 9.2 ounces


Item model number: AB0607


Batteries: 1 CR2 batteries required. (included)


Date First Available: May 20, 2022


Manufacturer: ROATEE


Country of Origin: China


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Nov 24

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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Similar Products

Top Amazon Reviews

    • Good value for the money
Color: 991 ES
The product has a slick design and adequately meets the computational needs of college students in quantitative disciplines. The “notepad” feature is really nice and comes real handy in the midst of calculations with more complex formulas.
Reviewed in the United States on June 14, 2024 by PER2012
    • Great calculator
Color: 991 ES
This calculator is an amazing value. It does much more than I will ever need - but when you consider the price - who cares? There are a couple of features that take getting used to - but nothing to offset the worth of the calculator.
Reviewed in the United States on July 1, 2024 by Tim Baker
    • Clone of the Casio 991EX ClassWiz, but with some interesting and cool tweaks
Color: 991 ES
First off, this is NOT a review by a "paid" reviewer, or in exchange for a free product I received. I see quite a few reviews in exchange for a free calculator in this listing, so I suspect the company is new and trying to get the word out about their product. This calculator caught my eye because it appeared to be an more feature-rich version of several recent competitor models that have the write/erase slate (the "e-writer") feature. Disclosure: I'm a die-hard Hewlett-Packard calculator collector, so my preference is always for RPN-based calculators, but I do think highly of the Casio 991ES/EX models, and so I decided to take a chance and check out this one. It's possible this is a legitimate re-badged or Casio-licensed version of the 991ES Plus, sold by ROATEE, but I'm unaware of whether it is or is not, so I can't speak to that here. The calculator arrived in a very nice, sturdy box, reminding me of the kind of quality you get from an Apple product. White cardboard, form-fitted, and well protective. Opening it revealed the calculator and a beefy 72 page manual in very good English (I believe this might be taken verbatim from another manufacturer). This was not your typical single page manual like in most inexpensive calculators. The calculator itself appears to be well made and surprisingly thick and solid. I have a couple of other write/erase slate calculators which are significantly thinner, so it's interesting that this one is much thicker (probably about 15cm closed). It is held closed by a magnet, so the slate doesn't flop around like with others. The slate does not flip around the back, so it lays like a book on your desk. The calculator side contains the stylus in the lower right corner, firmly inserted. The top edge includes the battery compartment and the lock/unlock switch for the slate (more about this in a second). I'm surprised at the reviews who say they couldn't find the stylus or lock switch, because both are pretty obvious, and well called out in the first few pages of the manual. An imprinted legend on the back shows the position for the lock and unlock switch. The slate itself is pretty standard. I think the green "ink" could be a bit brighter, but it's very clear in bright light (classroom), and readable in low light, but a bit harder. The "clear" button is mounted on the calculator side as a round button at the top, above the screen. If the slate is unlocked, then pressing that button instantly clears the slate. If locked, then pressing the button does nothing. This is one of the better reasons to get this calculator; most competitors do not have the lock/unlock feature, and it's far too easy to wipe the slate by accident. This will not happen with this model, and it's really a must-have for this category of device. The electrical connection from panel to panel for erasing the screen is via a small copper flex ribbon cable near the upper hinge. It's possible that over time this ribbon cable could wear out and break, but it's super small, doesn't poke out, and it will likely be fine for life of the calculator. The calculator itself is VERY similar to the 991EX ClassWiz calculator, and functionally IDENTICAL to the 991ES Plus model, in terms of button and function placement. For example, on this version the RCL button is the default (face value), while STO is the shifted function, which is the same as the ES Plus model, whereas the EX model has them swapped. Comparing to the ES model, every button is in the same spot. Compared with the EX model, most are in the same spot, although the top row is a bit different. If you are familiar with the layout of either of the 991ES/EX family, you probably won't even notice a difference. Capabilities notably missing from this model, which are in the EX model, are the spreadsheet feature, the graphic "menu" in the mode screen, the super handy "QR" code feature in the Casio [really one of the best and most powerful Casio features!], more screen lines, more memory, and some additional helpful screens and more functions. 99% of the population, including Casio users, won't notice the missing EX features. I did not have the two-left-parenthesis problem with the keyboard that one user mentioned. The keys themselves are pretty typical for this type of product, and work well, with a sculpted edge to the shape of the keys. No missed or double presses, no super wiggly keys, etc. It's not an HP keyboard, but it's decent enough. :) The surface of the calculator is very similar to the EX model, with the textured matte black surface. The key legend colors are okay, but not super bright (the Casio colors are marginally better). Personally, I think the calculator looks very nice and professional, and has a good feel to it. It's lightyears better than the ES family, which has a semi-glossy black surface and picks up fingerprints like crazy. I'm a bit puzzled why it's so thick, given that virtually every similar model is thinner, but honestly, I think I like a bit of heft to it. It feels substantial and robust in the hand. Maybe it's just because of the stylus storage. My biggest complaint on this model is that the manual refers many features to the "Appendix", which is apparently a separate document that was not included. I'm not sure if that was intentional or accidental, but it is a bit frustrating, because some essential information is in there. For example, if you want to use the Conversion feature, you must know which conversion equation you want, by number [1-40]. These are listed in the Appendix document, and NOT in the manual. You CAN look them up online, or refer to a Casio manual, but it's not convenient. Same for the Constants, but at least they are listed by name (not number) in the supplied manual. In the grand scheme of things, this isn't a deal killer, and anyone reading this and thinking about getting it shouldn't be deterred by the lack of the Appendix. Note: the Casio ES Plus lists them on the attached hard cover, while the EX model has a set of menus grouped by function names. On the ROATEE, you're going to have to write down the numbers for each factor somewhere or keep a legend if you use those frequently. Basically, this is a clone of the Casio ES Plus model, and shares a majority of the EX functions. I can live without the Spreadsheet feature, which is honestly clumsy in a calculator form factor, of the EX, but I will always miss the QR code feature. Alas, you can't have everything, and I suspect that feature is copyrighted/trademarked by Casio, which would explain why it's not included. The rest of the differences from the EX are fine as far as I'm concerned, so other than these two small omissions, and the missing Appendix, there is no reason to pass on this calculator. It's excellent for any non-graphical needs, from middle through high school. Price-wise, it's more than the original, but then again you get a cool slate for taking notes and writing down intermediate answers, while still having access to all the same functions you need and like from the original. Overall, I give this a thumbs up, and hope to see more from this company. Especially if they ever would consider producing an RPN edition for all of us math nuts who love RPN. :) Well done, ROATEE! ... show more
Reviewed in the United States on October 12, 2022 by B. Bergman
    • Meets Expectation
Color: 991 ES
Excellent product. Very good idea to integrate e writer on this device. Received this today. Very nice packaging with clear instruction. I opened it and play around with it. Overall I liked it. The Pros 1. Very inexpensive 2. integrated e writer with scientific calculator 3. clam shell design to protect the calcualtor and writer 4. very lightweight. Cons 1. Flimsy plastic ( No complaint, this is not a thousand dollar iphone. ) 2. A little thick ( still fit in your pocket if you dont mind the bulge ) Overall Very good device for the money. ... show more
Reviewed in the United States on July 8, 2023 by scott wong
    • a useful tool
Color: 991 ES
I have worn out many calculators in my job, the last was an HP. This one seems very solid. Its thicker than most but not heavy, the note pad area acts like a case. This may make it more pocket resistant. It has a lot of features. The switching from hexidecimal to decimal is easier than the HP. Keys are OK, buffering is OK you can type fast wont lose any characters. The white board is nice you can sketch a few notes or an equation. It handles fractions or decimals smoothly, you can switch back and forth with one button. It has metric conversions and physical constants but you need the manual to be able to access any one since the are accessed only by an index number, so I call that not useful. The HP would let you page through the constants and had buttons for metric conversions (but fewer of them). It does not do RPN as far as I can tell but you can edit an equation after you type it. All in all I call it a useful tool, and definitely more effective than trying to use your phone to do the same. Some days you need real buttons. I would recommend for college students as well especially for chemistry. Chemistry involves a lot of entering four digit numbers with exponents, you too will wear out caculators. ... show more
Reviewed in the United States on May 7, 2023 by An online buyer
    • Great product
Color: 991 ES
Ordered for my son and he loves it so far. If I need to definitely would buy again, definitely would recommend to other people
Reviewed in the United States on June 27, 2024 by J & L Luna
    • Bad display
Color: 82 MS
The calculator has some very notable and usefull capabilities...however this was ordered because of the writing pad on the adjacent screen, which is almost completely unreadable, extremely dim and no contrast. There is no mention in the manual about adjustment. Contacted seller for some info...otherwise I will be returning the unit. ... show more
Reviewed in the United States on May 7, 2024 by Gilbert T Smith
    • Calculadora excelente
Color: 991 ES
Cumple con lo que ofrece y es muy fácil de usar
Reviewed in the United States on July 3, 2024 by Alex

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