Add an extra serial port to the back of your pc from your motherboardr r easy to use and installr connects to your motherboard and adds an additional serial port to the back of your pcr backed by startechcoms lifetime warrantyr r this 9 pin serial to 10 pin header slot plate adapter features one db9 male connector and one idc10 connector the adapter is constructed of high quality components and expertly designed to ensure durability and reliability r please refer to the technical specific