Casio FX-991ES PLUS Scientific Calculator (12 Digit)

Two-way Power (Solar + Battery)
Solar Powered When Light Is Sufficient, Battery Powered When Light Is Insufficient.
Plastic Keys
Designed And Engineered For Easy Operation.
Natural V.P.A.M. Display
Display Expression Same As Textbook.
List Based STAT-data Editor
Viewing And Editing Of Input Data In List Format, Showing Data Groups (x-data, Y-data, Frequency) And Surrounding Data.
Multi-replay
Quick And Easy Recall Of Previously Executed Formulas For Editing And Re-execution.
10 + 2 Digits
10-digit Mantissa + 2-digit Exponential Display.
Dot Matrix Display
High-resolution Screen Provides Beautiful Looking Graphs Every Time.
Back To Standard Scientific Calculators
Features
New Functions
New Equation Mode
Random Integers
Standard Functions
Fraction Calculations
Combination And Permutation
Statistics (List-based STAT Data Editor, Standard Deviation, Regression Analysis)
9 Variables
Table Function
Comes With New Slide-on Hard Case
fx-82ES PLUS/85ES PLUS/350ES PLUS Functions, In Addition To:
Equation Calculations
Integration/differential Calculations
Matrix Calculations
Vector Calculations
Complex Number Calculations
CALC Function
SOLVE Function
Base-n Calculation
Integration
Complex Number Calculations
Complex Number Calculations
Differential
Vector Matrix Operations
Matrix Operations
Fraction Calculations
Product Dimension:11.1(H) X 80(W) X 162(D)Mm