10-digit, 2-line scientific calculator features a large display that shows the problem as you write it, and then shows the answer alongside. If you make an error, you can quickly clear it with the backspace key. Calculator offers one independent memory key and six constant memory keys. Solar-powered design also uses an included battery for convenient use anywhere. 240 built-in math functions speed up your equations to simplify the process. Slide-on hard case protects the calculator when not in use. This calculator is permitted on College Entrance Examination Boards including the SAT and PSAT/NSMQT.