The Brainboxes Px-101 is a PCI Express Card that provides two RS232 serial ports. Up to 921,600 data transfer rates and the 256 byte deep transmit and 256 byte receive FIFOs, coupled with 1Mbit/s line drivers deliver uncompromising performance on your laptop / PC.PCI Express is the latest standard in PC connectivity. Low profile board gives first serial port on the bracket, with a second serial port on a fly lead.