ULTIMA 2 Port DB9 Serial RS-232 PCI-Express Card Size name:2 port serial pce-e   Has 2 Ports PCI Express RS232 Controller Serial Card (9 Pin). The RS232 Serial Adapter Card is compatible with a broad range of operating systems, including Windows and Linux (Kernel 2.6.11 And up). Plus, the adapter card includes an optional half-height/low profile bracket that allows the card to be installed in virtually any computer case - making it that much easier to add serial ports to a PCI Express enabled computer, regardless of the size of the computer case. Features: connect multiple serial devices to computer easily. Standard RS-232 male DB9 serial port compliant. It supports up to 2 serial ports Fast. Interface: -lane (x1) PCI-Express port. Output: 2 ports DB9 RS-232 external. Support data transfer rates up to 1 Mbps. (Serial Port) Multi card abilities of the card to allow for upgrade with additional serial. Stable and reliable with WCH CH382L Chipset. Operating system: Windows 98 / Me / NT4.0 / 2000 / XP / Vista / Win7 / Win8 / Server 2003 / Server 2008 / Linux. Increased speed and reduced CPU load by up to 48%: The adapter card is based on a native single chip design, that allows you to harness the full capability of PCI Express (PCIe) - providing optimum reliability and speed while reducing the load applied to the CPU by as much as 48% over conventional (bridge chip) serial cards. Package Includes : 1 - 2 Port Serial Card. 1 - Driver CD. Note : Color may different from actual image(green/black /blue) but product specification is common. Backed by Hi-Tech 6 Month Warranty Against manufacture defect and Lifetime Friendly Support.