Features: Made from high-quality PCB material, this serial card features a TXB073 chip and supports a range of operating systems, including Windows and Linux. Ideal for desktop users who require a 9-pin serial port for connecting various devices and equipment. Model: PCIE-AX99100-1S Chip: TXB073 Applicable Model: Desktop Computer Specifications: Material: PCB Type: Serial Card Model: PCIE-AX99100-1S Chip: TXB073 Interface Type: PCIE Applicable Model: Desktop Computer Number of Interfaces: 9Pin Supported Systems: Windows 2000/XP/Server 2003/Chip 64bit/Vista/Win7 Note: Please allow 1-2 cm error due to manual measurement; ensure you don't mind before ordering. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1x PCIe to RS232 Expansion Card