Tested working—has new batteries. The Texas Instruments TI-83 Graphing Calculator is a handheld device powered by batteries, featuring a regular-sized keypad for easy input. This graphing calculator, known for its reliability and functionality, is perfect for students, professionals, and anyone in need of precise calculations on the go. With the trusted Texas Instruments brand behind it, the TI-83 model is a durable and efficient tool for solving various mathematical equations and graphing functions.