This is a Sharp pocket computer. Since I cannot confirm all functions, I am selling it as junk. Please consider this item assuming it may not work or power on, as it is old. Also, the battery cover and side covers are missing. Please consider this item for parts, assuming it does not work. I would appreciate it if you could refrain from complaints other than those caused by my mistakes, so please feel free to ask any questions you may have. Please purchase this item only if you are satisfied with the condition.