991ES Plus 2nd Scientific Calculator & Function Calculator

A versatile, high-performance calculator designed for students, engineers, and professionals-covering complex math, science, and business calculations with ease.

1. 417 Comprehensive Functions (Multi-Mode Support)

• 8 core working modes: COMP (basic calculation), CMPLX (complex numbers), STAT (statistics), BASE-N (number bases), EQN (equations), MATRIX (matrix operations), TABLE (function tables), VECTOR (vector calculations)
• Advanced mathematical features:Calculus (integration & differential)
  Matrix/vector operations
  Complex number arithmetic
  Equation solving & fraction display
  
• Ideal for math, physics, engineering, and business courses

2. Clear Large-Screen Display

• 10+2 Digits display (67.6mm×38.1mm screen size): Shows complex calculation results (e.g., fractions, equations, matrices) clearly without clutter
• Intuitive math notation output: Matches textbook-style formatting for easier result reading

3. Practical Utility Features

• New equation mode: Supports and fraction display for precise algebraic calculations
• Random integer generation (RanInt#): Useful for probability & statistics tasks
• Multi-functional keyboard: Logical key layout for quick access to advanced functions (reduces operation steps)

4. Portable & Durable Design

• Compact body size (174.2mm×81.2mm×9mm): Lightweight and easy to carry in backpacks or pencil cases
• Included protective case: Shields the calculator from scratches and impacts (suitable for classroom, office, or on-the-go use)

What's in the box
1 x 991ES Plus Plus II Scientific Calculator Black & Product Manual