CARD, UNIVERSAL, PCI, RS232, 4PORT; Interface Type:PCI / RS-232; Bus Type:Universal PCI; Connector Type:9Way D Plug; Data Rate Max:115200bps; Kit Contents Descriptive:Card and software; Line / Bus Driver / Receiver / Transceiver Type:B16PCI958 UART; No. of Ports:4; Operating System Software:Win 9x/ME/2000/NT4/XP/Server 2003/Linux and Windows 64 bit