***** Best Quality Guranteed. *****Modern LCD- Large enough to be able to display graphs and equations simultaneously in order to facilitate calculations and corrections in high detail. Its 7x 3.3 size ensures comfortable use. *****Programmable System - Has a programmable system for all level courses and promotes student learning of concepts instead of button memorization for more efficient learning. *****Over 280 functions-including fractions, statistics, complex number calculations, linear regression, standard deviation, permutations, and variable solving *****Perfect for Advanced and Beginner courses including Pre-Algebra, Algebra I, Algebra II, Geometry, Trigonometry, Calculus, AP Calculus, AP Statistics, Biology, Chemistry, Physics, Finance & Business.