Add 2 high-speed RS-232 serial ports to your PC through a PCI expansion slot Compatible with any PC running Windows®, DOS® or Linux® for simple integration into your application Data transfer rates of up to 115.2 Kbps for efficient serial device performance Easy to install & use with full step-by-step instruction providing a hassle free serial solution 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. What’s in the box 2 Port PCI Serial Card Low Profile PCI Bracket Driver CD Instruction Manual