The Texas Instruments TI-83 Plus Graphing Calculator in black is a handheld device powered by batteries. With a regular key size, this calculator is designed specifically for graphing functions, making it a popular choice for students and professionals alike. The TI-83 Plus model from Texas Instruments is known for its reliability and efficiency in solving complex equations and displaying graphed results. Whether used for office tasks or in school, this graphing calculator offers powerful capabilities in a compact and portable design.