Victor 2140 Desktop Business Calculator, 12-Digit LCDExtra-large PC touch keys have the look and feel of a computer keyboard. Easy-to-read angled LCD display reduces glare. Selectable decimal and rounding switches. Auto power down feature. Power Source(s): Battery; Solar; Display Notation: Punctuated; Number of Display Digits: 12; Display Characters x Display Lines: 12 x 1.