Scientific calculator with sleek new design and slide on hard case. With Natural Textbook Display and 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 and II, Pre-Algebra, Geometry, Physics. Blue. Power Source(s): Battery; Solar; Display Notation: Natural Textbook; Number of Display Digits: 16; Display Characters x Display Lines: 16 x 4.