This HP 10SII + Scientific Calculator can be used for algebraic, trigonometric, probability and statistics functions. You can view expressions and results simultaneously using the 2 line, 10 character display. it has dedicated keys for common calculations including percentage, pi and sign change for quick and easy use. This calculator can be used for scientific and mathematical applications. It has a large 10 character display with 2 lines so you can fit more mathematical functions on the screen. It's dual and solar powered, with the battery acting as a back up for longer use. Store and recall important result suing the easy-to-use emory keys. There are dedicated keys for certain functions making this ideal for quick calculations. It has 240 built-in functions. It can quickly convert decimals to fractions and perform other hexadecimal functions including degree, hour, minute and seconds conversions. It has editable lists for statistics, standard deviation, variance and more. The protective cover will help to keep your calculator safe from everyday wear and tear. Decimals between -1 and 1 can be shown in either an exponential or decimal format.