Features: PCIE to 2 serial port card adopts MCS9900 original master control chip, which has strong compatibility, highly cost performances, physical serial port with interrupted address and strong stability. Output two independent 9pin standard serial ports, exclusive interrupted port numbers instead of virtual devices, and can connect various serial port devices. Data transmission rate: 110-230400Bps. Serial interface RS232 supports hardware flow control of RS232. Suitable for 16c550 UART standard and 256-byte transmit and receive FIFO. The speed data transmission rate is 250k/s. Support remote wake-up and power management functions. Specifications: Component:Plastic Data Transfer Rate:115200bps Size:Approx.12cm/4.72inch Package Includes: 1 Set Expansion Card note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.