This is a PCIe x1 network interface card with dual port RS-232 express serial ports and with 16950 UART that is all based on a MosChip MCS9904CV chipset. The dual port PCIe serial card lets you add 2 RS-232 serial ports using a single PCIe expansion slot. This dual-port serial adapter also includes both full profile and low profile/half-height brackets for compatibility with standard and small form factor computers. This PCIe card can be installed in a PCIe x1 slot and is perfect for connecting printers, scanners, CD-R/RW drives, memory card readers, bar code scanners and more. Our network interface cards are 100% compliant and offer a cost effective answer for all of your networking needs. With our certification test program, we guarantee your product will work right the first time.