Siig 4-Port Serial PCIe Card. Host interface: PCIe, Output interface: PCI Express x1, Connector(s): 4x 9-pin Serial. Data transfer rate: 15 Mbit/s. Certification: ROHS, FCC Class B, CE. Colour of product: Green. Platform: PC, Connectivity technology: Wired, Compatible operating systems: Windows 7, Vista, XP, Server 2003, 2008, 2000