This is an old TI graphing calculator. It's supposed to be able to create graphs and perform statistical calculations, but I don't know how to use it. I've confirmed that it performs basic calculations and works, but I don't know if all the functions are working correctly. Also, it doesn't have a cover. Please check the condition from the photos, as there are fine scratches and dirt on the exterior. ※The ruler in the photo is not included in the product.