Feature(may vary by option.)
●【417 Functions】Scientific Calculator contains 417 functions that cover most of the scientific functions that students from middle school to college will need to use in their courses and exams. The included reading guide will help you understand how to use and find these functions.
●【Written Display Scientific Calculator】Input expressions and arithmetic operations same as written form in the textbook, which is more easy to read than traditional calculators. The 2 line display shows both input and calculation results,convenient for students to check the calculation process and results.
●【Brightness Adjustment Function】The brightness of the scientific calculators screen can be adjusted for optimal display with a simple operation, dimming it to relieve eye fatigue and brightening it for clearer results.
●【Dual Power Source Electronic Calculator】Solar and battery, double safe uninterruptible power, environmental protection and energy saving advantages.
●【Ultra-light & Portable】Weight: 5.1oz. (145g); Size: 164 x 80 x 17(mm)/6.4 x 3.15 x 0.6 7(inch); Material: ABS plastic. With slide-on hard case, convenient to carry it outside and hold it on one hand.
[OS-991MS II]
[OS 991ES PLUS Ⅱ]
[OS-82MS II]
[OS 82MS Pro]
Description
Multiple Applications
Osalo OS-991es Plus 2nd Edition Scientific Calculator features a sleek design and slide-out hard case with a written display and screen brightness (manual) adjustment functions. There are 417 functions: including basic and advanced science, exponential and trigonometric, fractions, regression analysis, table function and more. Its perfect for middle school to college students studying general maths, integral calculation, statistics, algebra, geometry and physics. Solar & Battery power supply.
Easy Read Written Display
Written display expression, convenient for students to check the calculation process and results.
Dual Power Supply
Solar and battery, double safe uninterruptible power, and energy-saving advantages.
Premium Sensitive Keys
Keys in the different areas have different shapes, are very sensitive. The letters printed on keys are pretty clear.
With ABS Slide Case
It has 417 functions and covers most of the needs of scientific functions that students may need in math, physics, chemistry, etc.
Model
 417 Function New Version |  Calculator 401 Function |  240 Function New Version |  Calculator 417 Function |  Calculator 240 Function | |
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Customer Reviews
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Price
| $21.99 | $17.99 | $15.99 | — | $13.99 |
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Model Type
| OS-991es Plus Ⅱ | OS-991MS Ⅱ | OS-82ms Ⅱ | OS-991es Plus | OS-82ms |
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Function
| 417 | 401 | 240 | 417 | 240 |
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Solar & Battery
| Solar & Battery | Solar & Battery | Solar & Battery | Solar & Battery | Solar & Battery |
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Battery Type
| L1154F | L1154F | L1154F | LR44 | LR44 |
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Color
| Black | Black | Black | Silver | Black |
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Dimensions
| 6.46 x 3.15 x 0.67 inches | 6.46 x 3.15 x 0.67 inches | 6.46 x 3.15 x 0.67 inches | 7.5 x 3.2 x 1.5 inches | 7.24 x 3.43 x 1.54 inches |
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Weight
| 5.1 ounces(145 g) | 5 ounces(141 g) | 4.9 ounces(139 g) | 6.3 ounces(180 g) | 5.3 ounces(150 g) |