Features: 1.4 RS232 Serial Ports: Features 4 x 9pin RS232 serial ports allowing easy connection of more serial devices to your computer. 2.PCI Express X1 Interface: PCI Express x1 interface (also suitable for PCI-E x1, x4, x8, x16 slots) for excellent performance and long life. 3.Characteristics: Has a stable and reliable chipset for AX99100 with a signal enhancement chip. Supports remote wake up and power management functions. 4.PCI Express: Single lane (X1) PCI Express endpoint control with PHY integration, PCI Express 2.0 Gen 1 compliant, PCI Express Card compliant, PCI Power Management 1.2 compliant, supports MSI interrupts, supports ASPM power management. 5.Applications: Serial connected devices, serial monitoring devices, data acquisition systems, POS terminals and industrial PCs, I/0 expansion of serial I/0/USB embedded systems for add on cards. specification:Item Type: PCIE Expansion Card Material: PCB Chipset: for AX99100 Port Number: 4 x RS232 Serial Port Interface: PCI Express 1X Slot Applies To: PCI E X1, X4, X8, X16 Slots System Requirements: for Windows XP, for 2003 Server, for vista, for WIN7, for WIN8.x, for WIN10, for Linux Kernel 2.6.15 and Later, for Android 1.x/2.x/3.x/4.x/5.x Bezel Length: Approx. 120mm / 4.7in Operating Temperature Range: -40 to 85 PackageList:1 x PCIEExpansionCard