The Voyage 200 is an advanced graphing calculator from the company Texas Instruments. The calculator is built with a full QWERTY keyboard so that users may quickly and easily input calculations. Along with the keyboard, the Voyage 200 also has an accompanying 128 by 240-pixel resolution display that is large and easy to read. It is also equipped with 2.7 MBs of memory, so users can save important graphs and calculations when needed. Along with this, the calculator features many built in programs such as a Computer Algebra , Pretty Print, and various graphing tools and sketchpads. The Texas Instruments Voyage 200 graphing calculator requires four AAA batteries to run. Fulfill all your graphing needs with the Voyage 200 Graphing Calculator.