This Texas Instruments TI-81 Plus graphing calculator is a reliable tool for any student or professional who needs to solve complex calculations. It has a sturdy case and operates on batteries, making it easy to take with you on the go. The calculator features an LCD display and includes various functions for graphing and analyzing data.

This calculator is a great choice for anyone in need of a high-quality graphing calculator. It is a Texas Instruments brand, with a handheld size that is easy to use and carry around. The calculator is in good working condition, and has not been modified. It comes with a case for protection and storage. Whether you are a student or a professional, this calculator can help you solve complex math problems with ease.