Description Features: PCI-Express I/O Card uses the latest PCI-Express interface as an expansion bus, which is the standard interface used in most mainstream PC computers on the market. Expand your system with 2 additional serial ports to connect external peripherals. This PCI-Express I/O card offers superior performance and unmatched data transfer speeds, which is also a great solution for industrial automation applications. Full duplex speed for serial port up to 25 Mbps per port, supporting remote wake-up and power saving features. Supports Windows 10/ 98/ME/ 2000/ xp/ Vista for Windows bit, and Linux. Package Contents: 1 pc x PCIe Card Specifications: Product Name: Pci-E to RS232 Serial Port Card Number of Interfaces: 2 RS232 DB9 Pin Serial Ports Applicable Slot: PCI-E Product Size: approx. 120x80mm/4.72x 3.15in Serial Port (RS-232) Interface. Chipset: AX99100 Chip Note: Color deviation may vary due to different monitor settings, please understand. There may be a slight size error in manual measurement.