This half size card provides 1 industry standard 9-pin RS232 serial COM port in a single PCI slot.As PCI is fully Plug & Play compatible the operating system or BIOS automatically configures the card ensuring conflict free installation.Low-Profile PCI is a new PCI card standard for space-constrained system designs. The new form factors maintain the same electricals, protocols, PC signals and software drivers as standard PCI v2.2 expansion cards. They are also mechanically similar; however, Low-Profile PCI is an additional form factor that defines a shorter raw card and new mounting bracket for card retention. The Low-Profile PCI definition is an engineering change notice (ECN) to the conventional PCI specification, Revision 2.2.The UC-235 uses Brainboxes new industry leading UART BB16PCI958 and supports both 3.3V / 5V standards. Brainboxes 1-port Universal PCI Serial Adapter is one of many Peripheral Device Cables available through Office Depot. Made by Brainboxes.