• Model : Fx-991ES.Types : Scientific calculator. Function Types : 403.Type of Power : solar & Battery.key Types : Plastic Keys.List-Based STAT Data Editor.CALC Function.40 science Constants. Combination and Permutation.Statistics can be calculated. 9 Memories Variable.Comes with hard case.Easy Menu function.Easy to carry,Type Of Power : Solar & Battery.The fx-991ES is a versatile scientific calculator designed for students and professionals. It features a natural textbook display, making complex equations, fractions, and roots easy to read and understand. With over 403 functions, it supports advanced calculations such as calculus, matrix operations, statistics, and more. Its dual power system (solar and battery) ensures reliable performance. The lightweight and compact design makes it portable for everyday use. The fx-991ES is ideal for engineering, mathematics, and science applications, offering precision and efficiency. Its intuitive layout and durable build make it a trusted tool for academic and professional environments.