Neewer 2 Ports PCI to COM 9-pin Serial Port RS232 Card Adapter 2 Ports PCI to COM 9-pin Serial Port RS232 Card Adapter Plug and Play, automatically assigned IRQ and I / O address Support PCI I / Q shared Transfer rate up to 1 Mbytes / sec Support PC with 32-bit PCI slot, MS Windows 98SE / Me / 2000 / XP / NT4.0, Linux, Vista, Win 7