Brainboxes PCI-e 8-port RS232 (25-pin). Host interface: PCIe, Output interface: RS232, Connector(s): 25-pin. Width: 110 mm, Depth: 70 mm, Height: 15 mm. Certification: RoHS, CE. Platform: PC, Compatible operating systems: Windows Server 2003 32/64-bit Windows XP 32/64-bit Windows Vista 32/64-bit Windows 2000