Texas Instruments BAIIPlus Financial Calculator, 10-Digit LCDPopular financial calculator for business professionals and students. Ideal for applications in finance, accounting, economics, investments and statistics. Prompted display guides you through financial calculations showing current variable and label. Auto power down feature. Power Source(s): Battery; Display Notation: Alphanumeric; Number of Display Digits: 10; Display Characters x Display Lines: 10 x 1.