Whether you're a student or professional, the 10bII+ makes it easy to solve business, financial, statistical and math calculations. Over 100 built-in functions including probability distributions. Intuitive keyboard layout with minimal keystrokes required for many common functions. Easy-to-read display with adjustable contrast and on-screen labels. Permitted for use on SAT, PSAT/NMSQT and College Board AP tests. Power Source(s): Battery; Display Notation: Numeric; Number of Display Digits: 12.