This is a SHARP pocket computer, likely manufactured in the 1980s. This device operates using programs written in BASIC and can also be used as a calculator. The case and switch contacts of this item have been cleaned. The exterior appears to be in good condition, but there are some minor scratches and paint剥がれ (peeling), so please check the photos for details. I have confirmed that there are no problems with operation and display by creating a simple program and performing key input, but I have not checked all functions. A cover is included with the main unit, but there are no manuals or other accessories. Batteries will be included for shipping. *The ruler in the photos is not included with the product.*