Casio FX-991 ZA Plus II

The Casio FX-991ZA Plus II is an advanced scientific calculator designed for South African STEM students and professionals. Here are its key features:

• Functions: 452 built-in functions
• Display: Natural textbook 2-line display
• Calculations: Integration, differentiation, sigma calculations
• Conversions: 40 scientific constants & 40 metric conversions
• Statistics Mode: Data handling and regression analysis
• Equation & Matrix Mode: Supports complex number calculations
• Power Supply: Solar & battery dual power
• Additional Features: Prime factorization, inequality calculations, ratio calculations