Texas Instruments TI-Nspire CX Graphing Calculator

Features:

• Full-color screen with backlit display.
• All the functionality of the TI-Nspire CX handheld plus a built-in Computer Algebra System (CAS).
• Touchpad navigation works more like a laptop computer.
• Ability to utilize images and overlay with graphical elements on screen
• Powered by a TI-Nspire Rechargeable Battery (Included)
• View multiple representations of a single problem on screen, at the same time.
• Make changes to one representation of a problem and instantly see how it affects other “dynamically linked” representations 
• Built-in interactive geometry capabilities.
• Navigate easily between screens and functions using the intuitive, computer-style interface that includes drop-down menus and simplified cursor controls.
• Enter text easily using individual (alpha) letter keys.
• Create and save problem-solving steps as electronic TI-Nspire documents similar to those on a computer. 
• Link directly to another TI-Nspire or TI-Nspire CAS handheld or a computer to easily transfer TI-Nspire documents back-and-forth.
• Available memory: 16MB RAM / 20MB ROM