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Item #:
90617567
OA-991ES Plus Scientific Calculator with Natural Formula Visualization Display 417 Functions Dual Power & Lightweight Design for High School Students
Item #:
90617567
ZAR 578
Price Details
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Imported from USA store
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Complies with STEM-approved standards with exam-mode features that disable advanced functions—trusted by educators for standardized test prep.
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What Stands Out
Natural Formula Display
Visualize complex formulas effortlessly with the natural display feature, enhancing understanding and learning for students and teachers alike.
Dual Power System
Utilizes both solar and battery power to ensure reliability and longevity, making it ideal for extensive use in classrooms and beyond.
Lightweight Design
Designed for portability, the lightweight structure makes it easy for students to carry in backpacks, ensuring they always have the tools they need for success.
Product Details
- 【Exam Compliance】Complies with STEM-approved standards with exam-mode features that disable advanced functions (local policies may vary). Includes anti-cheating design and clear exam-mode instructions—trusted by educators for standardized test prep.
- 【Natural Formula Visualization】Displays fractions, integrals, and equations in a Classroom-standard format. Step-by-step tracking helps students understand problem-solving logic, while teachers can demonstrate derivative calculations from four perspectives.
- 【417 Calculation Functions】Engineered for STEM curricula, supporting matrix operations (up to 4x4), vector calculations, 40 metric conversions, and 9 variable memories. Ideal for use in schools, offices, and business, meeting the needs of various fields.
- 【Professional-Grade Durability】Shock-resistant design with a 3-layer protective case (scratch-resistant screen, reinforced buttons, and impact-absorbing frame). Dual power (solar/LR44) enhances energy efficiency—built to withstand daily classroom use and backpack tosses.
- 【Ergonomic Learning System】Reduces neck strain during extended use. Features a variety of function keys to simplify complex calculations, including the ‘S-D’ button for toggling between fractions and decimals, making exact value calculations effortless.
| Calculator Type | Engineering/Scientific |
| Power Source | Solar Powered |
| Screen Size | 2.5 Inches (6.4 cm) |
| Number of Batteries | 1 LR44 batteries required. (included) |
| Display Type | LCD |
| Color | black |
| Enclosure Material | Plastic |
| Item Dimensions L x W | 6.5"L x 3.15"W (16.5 cm) |
| Brand | DUPOTA |
| Model Name | OA-991ES Plus |
| UPC | 726434206862 |
| Manufacturer | DUPOTA CO.,LTD. |
| Mfr Part Number | OA-991ES PLUS-XY |
| Model Number | OA-991ES Plus |
| Item Weight | 125 Grams |
| Unit Count | 1.0 Count |
Who Should Buy?
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High School Students
Ideal for students needing advanced calculations and formula visualization for subjects like math, physics, and chemistry.
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Teachers
Useful for educators demonstrating complex equations and concepts in a clear, visual format during lessons.
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STEM Enthusiasts
Great for individuals engaged in science, technology, engineering, or math, requiring extensive functions for diverse calculations.
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Casual Users
Not ideal for those who only need basic calculations or infrequent usage of advanced mathematical functions.
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Professional Engineers
May not meet the complex needs of engineering professionals requiring advanced programming or graphing capabilities.
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Very Young Students
Not best suited for young beginners who might find more straightforward calculators easier to understand and use.
Product Description
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Customer Questions & Answers
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How to Shop OA-991ES Plus Scientific Calculator with Natural Online From Ubuy?
Answer: It’s easy to shop OA-991ES Plus Scientific Calculator with Natural online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location. -
Question:
Is OA-991ES Plus Scientific Calculator with Natural Available to Shop Online in South Africa?
Answer: Yes, at Ubuy South Africa this product is available for you to shop at a reasonable price. The OA-991ES Plus Scientific Calculator with Natural is not available locally but you can trust us with our express shipping services. -
Question:
How Long Does It Take to Get Product After Placing the Order?
Answer: The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.
DUPOTA Scientific OA-991ES Plus Editorial Review
** OA-991ES Plus Scientific Calculator** The OA-991ES Plus Scientific Calculator has garnered a positive reception from students and educators alike, lauded for its extensive functionality and durability. With an impressive repertoire of 552 functions, it caters to a wide spectrum of mathematical needs, from basic arithmetic to complex calculus and statistical calculations. Users find it particularly beneficial for its ability to display calculations in two lines, allowing for a clear view of both the input and the output, which proves essential during examinations and homework. Transitioning from other brands can pose a small learning curve; however, many users appreciate the advanced features that are available at an affordable price point. Those coming from high-end calculators, like HP models, noted a surprising equivalence in functionality, albeit at a fraction of the cost. Additionally, the incorporation of solar power alongside battery backup alleviates concerns regarding energy Consumption, enhancing its practicality for everyday use in academic settings. Despite its strengths, some users have highlighted a few challenges, such as its tendency to provide answers in fraction form, which may be inconvenient during tests. Moreover, while it is packed with numerous features, the absence of specific financial calculations may limit its utility for certain professional applications. Overall, the OA-991ES Plus emerges as a robust academic tool, ideal for middle and high school students and valued by teachers for its reliability and versatility. **
Customer Reviews & Ratings
57 customers ratings
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5 Star
68%
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4 Star
14%
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3 Star
4%
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2 Star
7%
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1 Star
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Pros
- Comprehensive range of 552 functions, covering basic to advanced mathematics.
- Two-line display for clear visibility of calculations.
- Reliable solar and battery operation, reducing the need for frequent battery changes.
- Lightweight yet durable design makes it ideal for school use.
- Affordable alternative to more expensive scientific calculators.
Cons
- Initial learning curve for users transitioning from other brands.
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
ZAR 578
Order now and get it around Sunday, July 26
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
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PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
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Features & Benefits
- Compliant with STEM-approved standards for standardized test preparation.
- Includes anti-cheating features and clear exam-mode instructions.
- Offers 417 calculation functions tailored for STEM curricula.
- Shock-resistant design with a triple-layer protective case.
- Dual power sources enhance energy efficiency for daily use.
- Ergonomic design reduces neck strain, simplifying complex calculations.
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