Scientific calculator with sleek new design & slide on hard case. With Natural Textbook Display & improved math functionality. This calculator has been designed as the perfect choice for middle school through high school students learning General Math, Trigonometry, Statistics, Algebra I & II, Pre-Algebra, Geometry, Physics. Black. Power Source(s): Battery; Solar; Display Notation: Natural Textbook; Number of Display Digits: 16; Display Characters x Display Lines: 16 x 4.