【Multifunctional Student Calculator】: The scientific school calculator supports calculations up to 10 digits, with clear and easy-to-read data, suitable for advanced users and beginners. It includes standard calculator functions, memory buttons, square roots, and percentages, labeled MU, covering basic calculations, scientific function calculations, or other professional calculation functions. 【Reusable Notepad】: Combining a calculator and a writing board, with a stylus fixed on one side of the board, you can calculate and record at any time, effectively improving learning and work efficiency. The handwriting board has an erase button. You can click this erase button to clear the entire screen, allowing for repeated writing, reducing paper consumption, and being environmentally friendly. 【Solar and Battery Dual Power Supply】: The two button batteries can be replaced at any time without installation screws. The solar calculator on the left is powered by LR1120 batteries, or it can be powered by solar energy in a sunny environment, so you don't need to worry about the batteries running out. (Note: The writing board on the right is powered only by CR1220 batteries.) 【Comfortable and Silent Buttons】: The calculator features silicone buttons that are soft to the touch, quiet, and silent. It's silent during writing, providing a more comfortable feel, suitable for office operations, accounting calculations, student computer learning, and various usage scenarios. 【Portable and Practical】: The scientific function calculator is designed as a foldable clamshell type. The calculator's clamshell design can well protect the mechanical calculator keyboard and writing pad, making it easy to carry. Perfect for business work, engineering calculations, accounting calculations, student physics calculations, home use, etc. It is an ideal choice for middle school and high school students, college students, and professional researchers.