This is a PCIe x1 network interface card with 4 port RS-232 express serial that includes a breakout cable. The 4-port PCIe serial card (with breakout cable) lets you add 4 RS-232 serial ports using a single PCIe expansion slot with an included 1-to-4 cable enabling you to add 4 serial ports to a single low profile slot. Based on a WCH CH382 chipset, this multi-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.