Ideal for the algebra classroom. Lets students graph and compare functions, as well as perform data plotting and analysis. Horizontal and vertical split screen options. Advanced functions accessed through pull-down display menus. Includes tools for finance. I/O port for communication with other TI products. Power Source(s): 4 AAA Batteries with Lithium Battery Backup; Display Notation: Graphic; Number of Display Digits: 10; Display Characters x Display Lines: 16 x 8.