A dedicated calculation tool
Handle scientific calculation work without depending on a phone, browser or separate app.

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Why it works
A 991ES PLUS-style scientific calculator with a physical keypad, 12-digit display and included coin battery for study, homework and desk-based calculation.
Key benefits
Handle scientific calculation work without depending on a phone, browser or separate app.
A physical keypad separates calculation work from phone notifications and other on-screen distractions.
The included coin battery lets you use the calculator at a desk, in class or while studying without a power cable.
Details that matter
This 991ES PLUS-style scientific calculator gives students and everyday users a dedicated physical tool for calculation work without relying on a phone, browser or app. A 12-digit display and scientific calculator layout make it suited to study, homework and desk-based problem solving.
The calculator uses coin batteries and includes the required battery, so it can be used without setting up a rechargeable device or finding a power outlet. The physical keypad keeps calculation input separate from notifications and other distractions on a mobile device.
How it works
Use the included coin battery to power the calculator.
Use the physical scientific-calculator keypad to enter the expression or operation you need.
Use the 12-digit display to review the calculation result.
The specifics
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