**Specifications:**
**Brand:** deli
**Model:** JD991CN
**Functions:** Scientific calculator with trigonometric functions (SIN, COS, TAN)
**Compatibility:** Different exam environments may have varying requirements for calculators, it is recommended to confirm regulations before ordering
**Features:**
- Chinese display
- Dual power source
- Suitable for university entrance exams, school grades, competitions, statistics, equations, functions, inequalities, proportions, complex numbers, matrices, vectors, exponentials/logarithms, prime factorization, absolute values, summation
**Display:** High-definition large screen
**Power:** Long-lasting dual power system
**Additional Features:**
- 498 calculation functions
- Suitable for primary school to university and professional fields
- Synchronization with textbooks
- Multiple modes
- High-resolution dot matrix screen
- Durable metal-plated keys
**Dimensions:** 171.7 × 82.6 × 17.6mm
**User:** Students or finance professionals
**Color:** Black
**Weight:** Not specified
For a more detailed list of functions and operations, please refer to the user manual. The deli JD991CN calculator is designed to provide outstanding performance and reliability for various educational and professional applications.
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