This Canon scientific calculator is believed to have been manufactured in the 1970s. It's an early portable scientific calculator, characterized by its colorful operation panel and the red LED display. It has a pull-out battery compartment on the back that uses four AA batteries. An instruction manual and a case (made by CASIO) that fits the calculator are included. This item has been tested and confirmed to perform basic calculations correctly. There are minor scratches and stains on the surface, so please check the appearance from the photos. While there are currently no issues with the buttons or display, due to its age, the operation after shipping cannot be guaranteed. ※ The ruler in the photos is not included with the product.