1, Wide Application: PCIe combo serial parallel expansion card for Standard Desktop, Server, POS, PLC, Factory Control, Automation, Scientific Sensor, Scanner,etc. 2, Combo Expansion: Add 2 high speed pin, RS 232 serial ports and a pin parallel port to your PC via the MINI PCI E expansion slot. 3, Slim Bracket: pin parallel port baffle cable and pin RS 232 serial baffle cable with tall and short irons, suitable for 2U chassis, support for Windows and for Linux. 4, Number of Interfaces: PCI express to printer LPT port expansion card has 2 DB9 pin RS 232 serial ports, 1 pin parallel port. 5, Thickened Gold Plated Pin: Serial PCIe card adapter adopts immersion gold process, which has good conductivity and anti oxidation, ensuring good and improving data transmission rate.