Siig 4-Port Serial PCI Card. Host interface: PCI, Output interface: 32-bit PCI, Connector(s): 4x 9-pin RS232. Certification: ROHS, FCC Class B, CE. Minimum processor: Pentium. Colour of product: Green. Platform: PC, Connectivity technology: Wired, Compatible operating systems: Windows 7 / Vista / XP / Server 2003, 2008 / 2000 / NT 4.0 / ME / 98SE / 98 / 95 DOS