StarTech.com 4Port RS232 PCI Express Serial Card, PCIe, 4x DB 9-pin M, Black, ROHS, CE, MosChip MCS9901, 0.787" (20 mm) StarTech.com 4Port RS232 PCI Express Serial Card. Host interface: PCIe, Connector(s): 4x DB 9-pin M. Product color: Black, Certification: ROHS, CE. Chipset: MosChip MCS9901. Width: 0.787" (20 mm), Depth: 2.76" (70 mm), Height: 2.44" (62 mm). Data transfer rate: 0.25 Mbit/s, Connectivity technology: Wired, Compatible operating systems: Win 95, 98, ME, XP, Vista Linux 2.6.11 + Mac 10.4 + DOS