Texas Instruments TI-84 Plus Graphing Calculator School College Math All Purpose with Cover (Tested working). This Texas Instruments TI-84 Plus Graphing Calculator is a powerful tool for solving math problems. With USB connectivity, calculus functions, and programmable features, it's perfect for students, professionals, and anyone who needs to crunch numbers. The compact handheld size makes it easy to take on the go, and the regular display size is easy to read. It features basic, financial, scientific, and graphing capabilities, making it a versatile tool for a wide range of applications. Its backlight and calculus functions are also noteworthy features. This calculator runs on batteries as its power source. It is a great addition to any office or workspace. This particular calculator has been tested and is in working order. It comes with a cover to protect it from scratches and damage. Batteries not included Screen has a very small pale spot near lower right, however it does not affect the ability to see anything clearly.