The Texas Instruments Ti-Nspire Graphing Calculator in black and yellow is a handheld device powered by batteries. This model, TI-Nspire CX, features a backlight for easy viewing, calculus capabilities, and a clock function. Ideal for use in various office and educational settings, this graphing calculator offers advanced features for solving complex equations and graphing functions with precision and ease. The trusted brand of Texas Instruments ensures the reliability and accuracy of this essential tool for professionals and students alike.