The Texas Instruments TI-89 Titanium Graphing Calculator is a handheld device powered by batteries, featuring a regular-sized LCD display. This graphing calculator, part of the Texas Instruments TI-89 series, is equipped with a variety of features such as USB connectivity, backlight, calculus functions, clock, and programmable capabilities. Designed for office and business use, this calculator is ideal for solving complex mathematical equations and graphing functions with ease. Its brand reputation and reliable performance make it a valuable tool for professionals.in various industries. Batteries need replacement.