This genuine FTDI interface cable plugs into the USB port on the back of the FLEX-6000/8000 series radios to connect to devices requiring a serial (RS-232) connection for band switching. This functionality requires SmartSDR version 1.10 or later.
Please review some of the hardware that this can be used with at: https://www.flexradio.com/downloads/usb-cable-interface-guide-pdf/