Support PCI 32 bit, Speed of 33MHz, PCI Standard Version 2.3.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.Perfect for connecting serial modems, POS devices, PDAs, digital cameras, printers, ISDN terminal adapters and more to your system, the adapter card supports IRQ sharing and operates flawlessly with Windows 7, Server 2008 R2, XP, Server 2003, 2000, ME, 98, 95, NT4, 3.1, DOS and Linux. Don't support win10 operation system.Compatible with standard 16550 UART with 256 bytes of transmit receive FIFO.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.Here is the link to download driver for PCI Serial Port Card, which is interchangeable driver for Parallel or Serial prothttp://www.mediafire.com/file/yq889iaaky0uj0x/PCI_Parallel.rarProduct description:Maximum data transfer rate up to 115.2k/SecCompatible with standard 16C550 UART with 256 bytes of transmit receive FIFOSupport Windows 2000/XP/NT4.0/XP 64-bit/Vista, Linux, Dos, win7Don't support win10 operation system.Plug and playColor: silver + blackMaterial: PC + metalPackage Contents:1*pci to 2 rs232 adapter1* cd driverOnly the above package content, other products are not included.Note: Light shooting 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.