417 FUNCTIONS: This scientific calculator boasts 1,417 function, including algebraic, fraction, derivative, integral, statistical, complex number calculation, linear regression, standard deviation, permutation and combination, and variable solving, similar to operations found in math textbooks. It is well-suited for advanced and basic courses, high school and college students. LARGE DISPLAY SCREEN: Its screen is large enough to display four lines of numbers, making it easier to read than traditional calculators. The written display of expressions allows you to see the calculation process and results, making it a non-programmable calculator. SOLAR AND BATTERY DUAL POWER SYSTEM: The calculator features a dual power system that uses both solar and battery power, allowing users to use it anytime, anywhere, without worrying about battery issues. STABLE AND RELIABLE: The scientific calculator is made with high-quality materials, has a sturdy and durable exterior, and is easy to operate, with stable and reliable performance. WIDE RANGE OF USERS: As an essential school supply, it is ideal for elementary, middle, and high school students, college students, engineers, nurses, and teachers, among others. It can meet their calculation needs in math, science, and engineering fields and help them better understand and apply knowledge. As a gift, it can also be given to those who need to do scientific calculations, making it a practical and meaningful gift.s.