Casio FX-115ESPLS2-S 2nd Edition Scientific Calculator with slide on hard case & sleek new design. With the Natural Textbook Display, in addition to advance Statistics, Matrix, & Conversion functionality, is a perfect choice for high school & college students. Recommended for students taking General Math, Pre-Algebra, Algebra I & II, Geometry, Trigonometry, Statistics, Calculus, Chemistry, Engineering. Power Source(s): Battery; Solar; Display Notation: Natural Textbook; Number of Display Digits: 12; Display Characters x Display Lines: 12 x 2.