Star Tech.com 2 Port PCI RS232 Serial Adapter Card with 16550 UART 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. Perfect for connecting serial modems POS devices PDAs digital cameras printers ISDN terminal adapters & more to your system the adapter card supports IRQ sharing & operates flawlessly with Windows® 7 Server 2008 R2 XP Server 2003 2000 ME 98 95 NT4 3.1 DOS® & Linux®. The card can be connected in minutes through simple plug & play installation & is backed by a Star Tech.com lifetime warranty & free lifetime technical support..