Combines enhanced graphing capabilities with user-friendly computer features. Easy-glide touchpad works like a computer mouse for navigating screens, menus and objects. Included software allows calculator features to be downloaded to a home computer. Enhanced homescreen with scratchpad allows you to quickly perform calculations and graphs without saving your work. Explore on one screen up to four representations of a single problem, including algebraic, graphical, geometric, numeric and written. Quick-touch alpha keys at the bottom of the keypad. Keypad is interchangeable with the TI-84 Plus keypad (available on request) so you get all the features of both models at no additional cost. Recommended for algebra, trigonometry, geometry, calculus, statistics, linear algebra, biology, physics and chemistry applications. Extended life with optional rechargeable battery (sold separately).