Scientific Calculator 552 Functions, 2 Line Written Display Solar Battery Calculators, Support Fraction and Decimal Point Conversion Ideal for Middle High School Students Teachers 991EX PLUS

【552 Advanced Scientific Functions】A versatile scientific calculator designed for advanced mathematics, covering everything from statistics and standard deviation to complex 4x4 matrix calculations, vectors, and calculus. It is the ultimate tool for high school students, college students, and engineering professionals 【High-Resolution Natural Textbook Display】The 991EX scientific calculator features a high-resolution multi-line display that supports Natural Textbook Display technology. It shows mathematical formulas, fractions, and symbols exactly as they appear in textbooks, allowing you to view calculation processes and results simultaneously with ease 【High-Efficiency Computing & Spreadsheet Mode】Equipped with an advanced high-speed processor for rapid solving of high-order equations and large data sets. This advanced calculator includes an integrated spreadsheet mode and supports matrix calculation and vector operations, significantly boosting productivity in STEM fields and lab work 【Reliable Dual Power & Rugged Durability】This solar powered calculator features a dual power system (Solar + Button Battery) for uninterrupted performance during critical exams. It includes an intelligent 8-minute auto shutdown feature to save energy and a protective sliding back cover that is pressure-resistant and durable for high-intensity daily use 【Ultra-Lightweight & Ergonomic Portability】Weighing only 125g, this portable scientific calculator is sleek and easy to carry. The clear, non-slip button layout and dedicated "CHG" function key allow for instant fraction to decimal conversion, simplifying complex values and making it a reliable partner for precise calculations anywhere