The Texas Instruments Ti-83 Plus Scientific Graphing Calculator in black is a handheld device powered by batteries. It features a large display with 10 digits and regular key size. This calculator is specifically designed for graphing and scientific calculations, making it a valuable tool for students, professionals, and anyone in need of precise mathematical operations on the go. With the trusted brand of Texas Instruments, users can rely on the accuracy and efficiency of this graphing calculator for their various needs.