Bus Type: 32 Bit PCI Software Compatibility: Windows ME/NT/2000/XP/Vista/Windows 7, Linux Chipset: Oxford uPCI952 2 Year warranty Serial Port: Speed: Up to 921Kbps I/O Address: COM 1-8 IRQ Selection: 3, 4, 5, 7, 9 Card Connector: 2 x 9 Way D Male Parallel Port: Speed: Up to 2.3MBps I/O Address: LPT 1-6 IRQ Selection: 3, 4, 5, 7, 9 Separate Back Plate: 25 Way D Female Parallel port can be configured as ECP (Enhanced Capabilities Port), EPP (Enhanced Parallel Port), BPP (Bi-directional Parallel Port) or SPP (Standard Parallel Port)