The Texas Instruments T1-84 Plus Graphing Calculator is a handheld device with a regular key size and display size. It is powered by batteries and features an LCD display, calculus functions, and programmability. This model is designed for office and business use, making it a versatile tool for students, professionals, and anyone in need of advanced mathematical capabilities. Made by Texas Instruments in China, this graphing calculator is a reliable and essential tool for various calculations and problem-solving tasks.