Add a parallel port and two RS-232 serial ports to your PC through a PCI expansion slot. The PCI2S1P PCI Serial/Parallel Combo Card turns a PCI slot into two external 16C550 serial ports and one external EPP/ECP parallel port - an all-in-one solution that gives you both parallel and serial connections while taking up only one PCI slot.Suitable for installation in a small form factor computer, the PCI serial/parallel card includes an optional low profile/half-height mounting bracket that makes installation easy. The serial/parallel combo card is PCI plug and play ready and supports IRQ sharing for fast, simple installation. The combo card is supported in virtually any Microsoft Windows operating environment (Windows 7, Server 2008 R2, Vista, XP, ME, 2000, 98, 95 and NT4), and is backed by a StarTech.com Lifetime Warranty and free lifetime technical support.