CASIO Scientific Calculator 10-digit fx-50F C-POWER System Unlike conventional solar-powered calculators, this power system allows use even in dark places. A scientific calculator that can display up to 10 digits. External dimensions: Width 73mm x Depth 140mm x Thickness 8mm Weight: 68g It's quite old and has already been discontinued. Operation confirmed, with instruction manual. I kept it at home after no longer using it at work. Please consider purchasing if you understand that it is a used item.