Add 2 high speed rs 232 serial ports to your low profilesmall form factor computer with a pci expansion slot this 2 port 16550 serial card can be installed in a pci slot to add two serial ports a cost effective solution for connecting any new serial device or old legacy serial device with data transfer rates of up to 1152 kbps the serial card features a low profile bracket suitable for installation in low profilesmall form factor computer cases perfect for connecting serial modems