1. Easy to use: The scientific calculator makes it easy to solve the most complex math problems, equations and scientific formulas, and it can be a useful tool for both students and professionals. 2. Dual power supply: This portable school mini calculator has a dual power supply system with a built - in solar cell, a reliable battery that can last for about 3 weeks and about 3 weeks of standby time. 3. Versatile use: The multi - function calculator can be used for solving a variety of math problems, from GCSE and A - level exams to higher level studies, helping users to be prepared for different challenges. 4. Comprehensive functionality: With just a few steps, this multi - function portable student calculator can perform complex calculations, logarithmic and integral solutions. 5. Advanced functions: The scientific vector test calculator is designed with advanced functions to perform vector calculations and scientific research, and it can be a versatile tool for students and professionals. 6. Note: The appearance of different batches may vary slightly, which does not affect the use. 7. Color: Black 8. Contents: 1 * Scientific Calculator. Only the above package contents are included, and other products are not. 9. Note: Due to light reflection and different displays, the color of the item in the picture may be slightly different from the actual item. A measurement error of +/- 1 - 3cm is allowed due to manual measurement.