This is an RS-232C conversion adapter. The model number is not written, so it is unknown. 9-pin to 25-pin. I don't know which is male and which is female, so I've included photos. Please check them before purchasing. I also have other conversion adapters for sale, and I can offer a discount for combined purchases, so please feel free to ask. I used this several decades ago. Since the operation has not been confirmed, please consider it as junk. Returns, refunds, and cancellations are not accepted after purchase. #DOS/V #PC-98