Features: 1.Flexible Interface: This PCIe to RS232 expansion card provides RS232 9pin serial port and 25pin parallel port to meet the needs of different users for serial port and parallel port. 2.5Gbps High Speed: This PCIe com port adapter adopts PCIEx1 and has a bandwidth of 2.5Gbps, which can realize high speed and stable data transmission and ensure the accuracy and stability of data. 3.Widely Compatible: This PCI Express RS232 serial adapter card is compatible with a variety of operating systems, suitable for Win, for Linux, for DOS, and complies with IEEE1284 parallel port protocol, support SPP, EPP and ECP parallel mode. 4.Wide Application: This PCIe RS232 serial hose controller card is widely used in industrial control, automation equipment, POS machines, printers and other scenarios. 5.Durable Material: This PCIe serial parallel expansion card adopts durable printed circuit board material, making it a practical choice for home or office use. specification:Item Type: PCIe to RS232 Expansion Card Material: Printed Circuit Board Transfer Type: PCI Ex1 to RS232 9pin Serial Port + 25pin Parallel Port PCI E Bandwidth: 2.5Gbps Compatible Systems: For Win, for Linux, for DOS, etc PackageList:1 x PCIetoRS232ExpansionCard