The Casio FX-991EX ClassWiz Advanced Engineering Scientific calculator is a handheld device with a regular-sized display and key size. It is a solar-powered calculator that also has battery backup, making it convenient for various uses. With its LCD display, backlight, and calculus capabilities, it is perfect for engineering and mathematical calculations. The 552 functions provided by this model make it a reliable tool for professionals and students in need of precise calculations.
eBay