The Casio Classwiz FX‑85GTCW is a dual‑powered scientific calculator with over 290 functions, including trigonometry, logarithms, and complex number support. Its solar‑battery system ensures long use, while the backlit LCD displays clear results in low light. The compact black design fits comfortably in a pocket or pencil case, making it ideal for students tackling GCSE, A‑Level, or engineering coursework.