Negotiable

                                            Casio fx-991EX Scientific Calculator
100% Original, Made in Thailand
Solar Working, All okay 
location: mirpur 14
Whatsapp: 01788923855

**Casio fx-991EX Scientific Calculator Specification:**

- **Model:** Casio fx-991EX  
- **Type:** Scientific Calculator  
- **Display:** 2-line display with high-resolution LCD  
- **Power Source:** Solar-powered with battery backup  
- **Battery Type:** 1x AAA battery (for backup)  
- **Functions:**  
  - Over 500 functions  
  - Includes basic arithmetic, trigonometry, logarithms, statistics, fractions, and complex numbers  
  - Supports matrix calculations and vector operations  
  - Performs advanced calculations like integration, differentiation, and regression  
  - Equation solver for simultaneous equations and polynomials  
  - Fraction and decimal conversion  
  - Angle unit conversion (degrees, radians, and grads)  
- **Memory Functions:** 9 memory slots for storage  
- **Display Capacity:** 4-line display for easy input/output  
- **Ease of Use:** Natural Textbook Display (NT Display) for easier interpretation of formulas  
- **Dimensions:** 16.3 cm x 8.2 cm x 1.1 cm  
- **Weight:** 95 grams  
- **Durability:** Shock-resistant and built to last  
- **Ideal For:**  
  - Students, engineers, and professionals in fields requiring complex calculations  
  - Use in schools, colleges, and workplaces  
- **Certifications:** CE, RoHS  
- **Country of Manufacture:** Made in Thailand  

**Features:**
- User-friendly interface for quick operation  
- Solar-powered for energy efficiency with a battery backup  
- Compact and lightweight design for easy portability  
- Multi-line display to view multiple calculations at once  
- Fast and reliable calculation for accurate results  
                                    

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