English Information
CASIO FX-991ES PLUS (2nd Edition) Engineering Calculator｜CASIO FX-991ES PLUS-2nd edition工程型計算機Advanced scientific calculator ideal for engineers and students. Features 417 functions, high-resolution display, and dual power (solar & battery). Reliable tool for math, engineering, and science tasks.｜專為工程師和學生設計的高效能工程型計算機，具備417種功能、高解析度顯示及太陽能與電池雙電源。適用於數學、工程及科學用途。
