FX-991ES Plus Scientific Calculator 417 Functions Dual Power

Product DescriptionTurn Complex Mathematics into Clear, Manageable Steps

From everyday algebra to advanced equations, the right calculator can make challenging work feel far less overwhelming. The SENBO 417-Function Scientific Calculator combines a broad selection of mathematical tools with a clear, familiar display, helping students and professionals calculate, review and correct their work with greater confidence.

Its natural textbook-style display presents supported fractions, roots and mathematical expressions in a format that looks closer to printed study material. With four-line display support, eight calculation modes and Multi-Replay navigation, you can view more information, revisit previous entries and correct mistakes without repeatedly starting from the beginning.

Whether it is used for high-school study, university assignments, technical calculations or office-based numerical work, this compact calculator is ready to support the task.

Key Features

417 Scientific Functions

Natural Textbook-Style Display

Four-Line Display Support

8 Calculation Modes

Multi-Replay Calculation Review

Integration and Differential Calculations

Matrix, Vector and Complex-Number Functions

Statistics and Equation Calculations

Solar and Replaceable Battery Dual Power

Automatic Power-Off

Sensitive, Clearly Labelled Plastic Keys

Protective Sliding Cover

417 Functions for More Demanding Calculations

This calculator goes far beyond basic addition, subtraction, multiplication and division. Its wide range of functions supports both everyday learning and more advanced mathematical work.

Supported calculation areas include:

Fractions and mixed calculations

Powers, roots and logarithms

Trigonometric functions

Integration

Differentiation

Statistical calculations

Complex numbers

Equations

Matrix operations

Vector calculations

Function tables

Number-base calculations

Instead of changing between multiple devices, one calculator can support a variety of mathematical topics as learning requirements become more advanced.

Natural Display That Looks Familiar

Long formulas can become difficult to follow when every symbol is compressed into one simple line.

The natural textbook-style display presents supported expressions in a more recognisable mathematical layout. Fractions, roots, integrals and other symbols are easier to compare with examples in textbooks, worksheets and handwritten notes.

The display is particularly useful when:

Working through multi-step equations

Checking fractions and roots

Comparing answers with study material

Reading matrix and vector values

Reviewing longer expressions before confirming a result

A clearer view makes the calculation process feel more organised and helps reduce avoidable input mistakes.

Four-Line Viewing for More Information at Once

The calculator supports multi-line information display, allowing different calculation screens and values to be presented more conveniently.

Depending on the selected function or mode, the screen can show lists, tables, matrices and other mathematical information in an organised format. This is especially useful when working with statistical data, vectors, matrices or function tables where several values need to be viewed together.

Multi-Replay: Correct Without Starting Again

A small input error should not force you to repeat an entire calculation.

The Multi-Replay control allows you to move through previous entries, review what was entered and return to the section that needs correction. You can adjust the incorrect number or symbol and continue with less interruption.

This practical feature is helpful for:

Homework

Revision sessions

Long equations

Repeated practice questions

Technical calculations

Checking previous input

It saves time and makes longer calculations less frustrating.

Eight Calculation Modes

Choose the mode that matches your current calculation:

1. COMP - General calculations
2. CMPLX - Complex-number calculations
3. STAT - Statistical calculations
4. BASE-N - Number-base calculations
5. EQN - Equation calculations
6. MATRIX - Matrix operations
7. TABLE - Function tables
8. VECTOR - Vector calculations

The organised mode menu makes it easier to move between different mathematical tasks using one device.

Two-Way Power for Everyday Reliability

The calculator combines solar-assisted power with a replaceable button battery.

Available light helps support daily operation, while the button battery provides dependable backup power when lighting conditions are limited. The automatic power-off function helps reduce unnecessary battery use when the calculator is left inactive.

This dual-power design makes it practical for classrooms, libraries, study areas and offices.

Comfortable Keys and Protective Design

The clearly marked plastic keys are designed to respond comfortably during regular use. Colour-coded secondary labels make different functions easier to identify, while the central navigation key provides convenient control when reviewing calculations.

The included dark protective cover helps shield the screen and keypad when the calculator is stored inside a school bag, backpack, laptop bag or desk drawer.

Its slim design is easy to carry without taking up unnecessary space.

Suitable for Multiple Applications

Ideal for:

High-school mathematics

University study

Algebra and trigonometry

Statistics

Physics and science subjects

Engineering-related calculations

Financial and office calculations

Homework and revision

Examination preparation

Important: Calculator rules differ between schools, universities and examination bodies. Confirm the applicable requirements before using the calculator in a formal examination.

Specifications

Brand: SENBO

Product Type: Scientific Calculator

Model Style: FX-991ES Plus

Number of Functions: 417

Calculation Modes: 8

Display: Natural Textbook-Style LCD

Display Capability: Four-Line Support

Screen Format: 10+2 Digit Display

Replay Function: Multi-Replay

Power Supply: Solar-Assisted + Replaceable Button Battery

Power Saving: Automatic Power-Off

Approximate Size: 162 × 80mm

Approximate Weight: 113g

Body Colour: White with Blue and Orange Key Details

Protection: Sliding Protective Cover

What's in the box
1 x SENBO Scientific Calculator
1 x Sliding Protective Cover