This is a CASIO G-SHOCK. It is generally scratched. It is not working, so you will need to replace the battery yourself. Therefore, please note that the operation has not been confirmed. Please refrain from purchasing if you are concerned. This is a junk item, so we are sorry, but we cannot accept returns. In the unlikely event of a malfunction or damage, we would appreciate it if you could proceed with the purchase only if you can use it for parts or repair it yourself. Dial diameter: Approximately 4cm