Welcome to our store! 1. Flexible Interface: This PCIe to RS232 expansion card features an RS232 9-pin serial port and a 25-pin parallel port to meet the needs of different users for serial and parallel ports. 2. 2.5Gbps High Speed: This PCIe com port adapter uses PCIEx1 and has a bandwidth of 2.5Gbps, which can realize high-speed and stable data transmission, ensuring data accuracy and stability. 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 the IEEE1284 parallel port protocol, supporting SPP, EPP, and ECP parallel modes. 4. Wide Application: This PCIe RS232 serial 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 uses durable printed circuit board material, making it a practical choice for home or office use. Item Type: PCIe to RS232 Expansion Card Material: Printed Circuit Board Transmission 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. 1 x PCIe to RS232 Expansion Card Guaranteed Satisfaction: Customers are our top priority. If you find any issues with the product, please contact the seller immediately. We strive to provide satisfactory after-sales service.