Full Details from Amazon.com : http://www.amazon.com/gp/product/B0000TNZGW?tag=onigi-20
StarTech.com 4 Port PCI RS232 Serial Adapter Card with 16550 UART (PCI4S550N)
Guaranteed compatibility with any PC running Windows DOS or Linux for simple integration into your application
Data transfer rates of up to 115 Kbps for peak serial device performance
Easy to install and use with full step-by-step instruction providing a hassle free serial solution
Supports the RS-232 serial interface
Includes drivers for Linux and all versions of Windows
IRQ sharing saves resources and eliminates conflicts