The Texas Instruments TI-83 Plus Graphing Calculator in black is a handheld device powered by batteries. It features regular key size and is designed specifically for graphing functions. The TI-83 Plus model is known for its versatility and ease of use, making it a popular choice for students, professionals, and anyone in need of a reliable graphing calculator. With its reliable brand reputation and specific model features, this calculator is a valuable tool for various educational and industrial applications. This version is electronically upgradable.