Thank you for viewing. CASIO ・SUPER-FXPLUS・FX-5800P Multi-Function Calculator Please refer to the manufacturer's website, AI explanations, and other sellers' listings for detailed information on the calculator's functions. ★ I have only confirmed that the power turns on, but I have not checked all functions, so I will treat it as junk. Please understand that junk items have "no operational guarantee," "are broken," or "some functions are not usable." 【Included Items】 Calculator body (with new battery) Protective cover Neck strap Program list 【Notes/Product Condition】 The above items were stored indoors in new, unused condition several decades ago. There is no box or instruction manual. The protective cover shows signs of aging. Also, a small hole has been made in the calculator body cover for the neck strap (see the last two photos). I have also inspected the item, but there may be oversights. Please make your judgment based on the photos. This is a used item, and the product condition may vary depending on the individual, so please refrain from purchasing if you are sensitive to such matters. If you understand the above points, please consider purchasing.