This is a USB conversion cable made by I-O DATA. It has a USB Type-A connector and a D-sub 25-pin connector (parallel port). It is used to connect old printers and other peripherals to a USB port. I bought it used over 10 years ago, but I forgot about it and left it in storage. There is some minor wear and tear inside due to age. Please purchase only if you understand the above. Instant purchase is welcome. Thank you for looking.