Sienoc 2xDB9 RS232 9 Pin Serial + 1x DB25 Parallel Port LPT1 Printer Combo PCI Card PC Computer With WCH chipset 32-bit bus design and support the PCI 2.2 specification Automatic distribution of IRQ and I / O Address The use of high-speed I/O controller (16C550C or compatible UART) Application of the printers, external storage media or parallel port scanners,Support for Windows 2000 ,XP , VISTA ,WIN7,Win8 Message: This card can not use for the 278 or 378 Port When you connect the external devices( such as plotter,machine tool ) to this card ,the PC's system automatically assigns the address port (such as LPT1,COM1). If this address port of the peripheral equipment isn't on 278 or 378 port ,or can modify to other port. The peripheral equipment can normal use .