16 digit 4 line LCD display, Natural textbook display shows expressions and results exactly as they appear in the textbook, Over 280 functions, including fractions, statistics, complex number calculations, base arithmetic, linear regression, standard deviation, computer science, and polar-rectangular conversions, Multi-replay function allows you to backtrack step-by-step through calculations, where you can edit expressions and recalculate answers, Calculator has 40 metric conversions and 40 scientific constants, Table Function, Matrix and Vector Calculations, List-Based STAT Data Editor, Solar Plus with Battery Back-up, Comes with slide-on hard case