This Texas Instruments TI83 Plus Graphing Calculator is a reliable and efficient tool for all your mathematical needs. With a regular key size and handheld size, it is easy to use and carry around. The calculator has been tested and works perfectly, ensuring accuracy in all your calculations. It includes features such as an LCD display, calculus, and programmable functions, which make it ideal for both basic and scientific calculations. The calculator is also great for business and graphing purposes, making it a versatile tool for various industries. Made in the Philippines, this calculator is a high-quality product from a reputable brand.