Here is to download driver for PCI Serial Port Card, which is interchangeable driver for Parallel or Serial prot http://.mediafire.com/file/yq889iaaky0uj0x/PCI_Parallel. Product description: Maximum data transfer rate up to 115.2k/Sec Compatible with standard 16C550 UART with 256 bytes of transmit receive Support 2000/XP/NT4.0/XP 64-bit/Vista, Linux, Dos, win7 Don't support win10 operation system. Plug and play Color: silver + black Material: PC + metal Package Contents: 2 * pci to 2 rs232 adapter 2 * cd driver Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. The PCI2S550 2 Port 16550 Serial Card can be installed in an available PCI slot to add two RS232 serial ports to your system. A cost-effective solution for connecting any new or legacy serial device, with data transfer rates of up to 115.2 Kbps. Compatible with standard 16550 UART with 256 bytes of transmit receive . Perfect for connecting serial modems, POS devices, PDAs, digital cameras, printers, ISDN terminal adapters and more to your system, the adapter card supports sharing and operates flawlessly with 7, Server 2008 R2, XP, Server 2003, 2000, ME, 98, 95, NT4, 3.1, DOS and Don't support win10 operation system. The 2 Port Serial Card can be installed in an available PCI slot to add two RS232 serial ports to your system. A cost-effective solution for connecting any new or legacy serial device, with data transfer rates of up to 115.2 Kbps. Support PCI 32 bit, Speed of 33MHz, PCI Standard Version 2.3.