Add 16 RS232 serial ports (DB9) to your low or full-profile computer through a PCI Express slot 16-Port PCI Express Serial Card High-speed PCIe serial card with 16 DB9 RS232 ports from a single PCIe slot Multiport serial adapter card enables high-speed serial communication with data transfer rate up to 921.6 Kbps Compliant with PCI Express 1.0a/1.1 and compatible with 1x/2x/4x/ 8x/16x PCIe bus PCIe serial card / Multiport serial adapter card / Serial PCIe card / Serial expansion card