📟 Casio FX-991MS – Specifications

🔹 General Information

• Product Type: Scientific Calculator
• Model: FX-991MS
• Number of Functions: 401 functions
• Programmable: No
• Graphing: No

🔹 Display

• Display Type: LCD (Dot Matrix)
• Display Lines: 2-line display
• Digits: 10 + 2 digits (mantissa + exponent)
• Display System: S-V.P.A.M. (Natural textbook input style)

🔹 Power

• Power Source: Solar + Battery (dual power)
• Battery Type: 1 × LR44
• Battery Life: Approx. 3 years
• Auto Power Off: Yes

🔹 Memory

• Variable Memory: 9 variables
• Independent Memory (M+, M-)
• Answer Memory & Replay Function

🔹 Key Features

• Multi-replay function
• Equation solver (SOLVE function)
• CALC function (formula reuse)
• Fraction & decimal conversion
• Engineering notation
• Random number generation
• Hard slide-on protective case

🔹 Calculation Functions

✔ Basic Functions

• Addition, subtraction, multiplication, division
• Fractions & percentages
• Powers, roots, factorial
• Logarithmic & exponential calculations
• Trigonometric & inverse trigonometric functions

✔ Advanced Functions

• Differentiation & Integration
• Matrix calculations
• Vector calculations
• Complex number calculations
• Base-N (Binary, Octal, Hexadecimal) calculations

✔ Statistical Functions

• Standard deviation
• Regression analysis
• STAT-data editor

✔ Scientific Features

• 40 scientific constants
• Metric/unit conversions

🔹 Physical Specifications

• Dimensions: 155 × 78 × 13 mm
• Weight: Approx. 105 g
• Keys: Plastic keys

🔹 Included in the Box

• Casio FX-991MS Calculator
• Slide-on Hard Case
• Battery (pre-installed)