This Texas Instruments TI-83 Plus calculator is a reliable tool for any math or science student. With its graphing capabilities, it is perfect for creating visual representations of equations and data sets. The calculator is powered by batteries and is a handheld size, making it easy to carry around and use on-the-go. The brand of this calculator is Texas Instruments, a trusted name in the world of calculators. Its model number is TI-83 Plus and it falls under the categories of Business Industrial, Office, and Office Equipment. This calculator has been tested and is in working condition, ensuring that it will provide accurate results for any calculation needed.