Scientific Calculator OA-991EX Plus with 552 Functions, 4 Lines Natural Display Solar Battery School Calculator – Ideal for School College Maths Black

Price: €18.99
(as of Dec 30, 2025 16:41:35 UTC – Details)

From the brand

DUPOTA brand history

Your partner with knowledge, your assistant in precision.

DUPOTA, a leading calculator brand, offers exceptional precision and innovative design to meet the diverse needs of our worldwide customers. Our products are designed for peak performance and provide a user-friendly experience that makes complex calculations easy and accessible. With DUPOTA, every calculation is a testament to our commitment to accuracy and intelligence.

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Batteries ‏ : ‎ 1 LR44 batteries required.
Product Dimensions ‏ : ‎ 18 x 8 x 0.1 cm; 125 g
Date First Available ‏ : ‎ 19 April 2024
Manufacturer ‏ : ‎ DUPOTA CO.,LTD.
ASIN ‏ : ‎ B0D25ZBXBY
Item model number ‏ : ‎ OA-991EX PLUS
Country of origin ‏ : ‎ China
Guaranteed software updates until ‏ : ‎ unknown
Best Sellers Rank: 23,753 in Stationery & Office Supplies (See Top 100 in Stationery & Office Supplies) 63 in Scientific Calculators
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Intuitive icon menu & 552 functions: Use oa-991ex scientific calculator icon menu to quickly navigate through complex calculations; with 552 functions ranging from statistics and integrals to tables and 4×4 matrices, it meets the requirements of all scenarios, from classroom quotas. iz For the student to towards professional career.
High-resolution natural display: scientific calculator 4 line display clearly and comprehensively represent complex equations such as integrals and matrices, calculator input expressions in written display format, real-time display of calculation steps and results, convenient for students to learn efficiently, teachers can use the step-by-step display function to monitor the calculation process of demonstrate to help students understand.
【Multidisciplinary Applications】Scientific calculator without QR function, meets the device specifications for most academic scenarios (IB/AP); Built-in table calculation mode for fast processing of data and formulas. Built-in 47 physical constants and support unit conversion, ideal tool for students and professionals in engineering and physics.
Easy to use and precise calculation: scientific calculator with a weight of approx. 125 g, it is suitable for the hand; the special recessed „ON“ button prevents accidental touching, the clearly arranged function keys simplify complex calculations and the „CHG“ button switches between fracture and decimal mode at any time, making it easier to calculate accurate values.
Dual power supply and automatic switch-off: the solar calculator reduces the frequency of battery change and switches off automatically after 8 minutes of inactivity. The robust sliding cover protects your computer from bumps and scratches, and the adjustable contrast ensures comfortable readability in any light.