Add eight RS-232 DB9 serial ports to your desktop computer, through two PCIe expansion card slots. This PCI Express serial card, with two breakout cables, provides you with multiple ports to connect a wide variety of serial peripherals, at speeds of up to 921.4 Kb/s. Windows version only: 2 low profile brackets for PCIe 1 x card; Fully compliant w/ PCI Express Base Specifications, Revision 1.0a/1.1; Supports Windows (incl. XP and up) and Windows Server (2003 and up); For low profile desktop/servers