Spektrum - SPMA3065
In conjunction with the Spektrum TX/RX update computer software you can use this cable to update firmware on DXs and DXe radios and all receivers including jail breaking factory installed and programmed RX'x found in BNF aircraft.
Get the spektrum software here
For the DXs radio, the USB Serial Adapter is also required. Find it here.
This software does not support Mac.