TI's most advanced scientific calculator is ideal for engineers students and professionals. MultiView&trade display allows you to view multiple calculations at the same time while MathPrint&trade feature shows math expressions symbols and stacked fractions as they appear in textbooks. Input data scroll through entries and make edits like using a graphing calculator. Toggle key converts fractions and square roots into decimals and back. Power Source(s): Battery Solar Display Notation: Scientific Engineering Number of Display Digits: N/A Display Characters x Display Lines: 16 x 4.Unit of Measure : Each