100 percent compatible with all parallel printers tape-backups and operating systems (including MS-DOS PC-DOS DR-DOS CCI-DOS Windows 1, x 2, x 3, x WFW Windows-95 NT 3, x 4, x OS/2 1, x 2, x Warp 3, x 4, x SCO Unix Linux etc), Features: Single 25-pin female Parallel Port, Fully 8-bit bi-directional; suitable for all printers and tape back-ups, Configurable as LPT 1 through LPT 3 using IRQ 5/7/none, Supports industry standard addresses, Ideal for use with network print servers, SKU: CTG2438