This is a PCI-Express I/O card with 2x RS-232 serial ports and 1x IEEE-1294 parallel port. It uses the MOSCHIP MCS9901 chipset.Features Single Lane (x1) PCI-Express with transfer rate 2.5Gb/s full duplex channel2x RS-232 serial ports1x IEEE-1284 compatible parallel portCompliant with PCI-Express Revision 1.0aFully Plug & Play compatibleNote that this card now uses the MCS-9901CV chip. The manual specifies using drivers in the MCS9900 directory. Please use the drivers in the MCS9901 directory instead.