Texas Instruments TI-Nspire CX, Graphing CalculatorCondition:* Used, Appears To Function Fine. USB Cable Included.* As Pictured.Additional Notes:* Color, Backlit Display* Screen Size: 320 x 240 Pixels (3.5″ Diagonal)* Screen Resolution: 125 DPI; 16-Bit Color* Powered By The TI Rechargeable Battery (Included)* USB Port For Computer Connectivity, Unit-To-Unit Communication With Other TI-Nspire Family Graphing Calculators* 100 MB Storage Memory / 64 MB Operating MemoryTexas InstrumentsTI-Nspire CX