A. Easy to use: The scientific calculator makes it easy to solve the most complex math problems, equations and scientific formulas, making it an essential tool for both students and professionals. B. Dual power supply: This portable school mini calculator has a dual power supply system with a built - in solar cell, a reliable 3 - week battery and 3 weeks of standby time. C. Versatile use: The multi - function calculator is suitable for solving a variety of math problems, from GCSE and A - level exams to higher level studies, ensuring you are well - prepared for any challenge. D. Comprehensive functionality: With just a few steps, this multi - function portable student calculator can perform all your complex calculations, logarithmic and integral solutions needs. E. Advanced functions: The scientific vector test calculator is designed with advanced functions to perform vector calculations and scientific research, making it a versatile and indispensable tool for students and professionals. F. Note: The appearance of different batches may vary slightly, which does not affect the use. G. Color: Black H. Contents: 1 * Scientific Calculator. Only the above package contents, other products are not included. I. Note: Due to light reflection and different displays, the color of the item in the picture may be slightly different from the actual item. Please allow +/- 1 - 3cm error due to manual measurement.