Features: Experience fast data transfer with our RS232 Expansion Card featuring the WCH384 chipPerfect for high speed communication needs. Our PCIExpress compatible card supports a throughput of up to 2.5Gbps, ensuring seamless and efficient performances. Compatible for industrial standard 16C550\16C552\16C554 and 16C750 UART On chip 256-byte depth in transmit, receive paths of each port Support for double directional data transmission, the transmission speed up to 2M bytes support The built-in SIR infrareCODEC, support 2400bps to 115200bps rate IrDA infrare communication.Supports 5-6-7-8bitSerial format.support 1 or 2 Stop bit operationBuilt-in 2,EPP,ECP compatibles for IEEE1284 Printing Protocol Specifications: Material:PCB+Metal Fully compliant with PCIExpress Base Specification Revision1.1 SingleLan PCIExpress with throughput up to 2.5Gbps Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xRS232 DB9 4 Port Expansion Card