This is the Castle Creations PHX-Link Phoenix USB Programming kit.

FEATURES: Adapter for PC Interface with Phoenix, Mamba, Barracuda, Phoenix HV
            and Thunderbird Brushless controllers
          View, change and customize program options
          Update ESC software via the Internet
          Compatible with Windows XP and Vista (32 and 64 bit)
          USB port required

INCLUDES: One instruction sheet
          One USB connector
          One PHX link Interface

REQUIRES: Internet ready PC with an available USB port

SPECS:    Length: PHX link:      13-1/2"  343mm
                  USB Connecter:     71"  180cm
                                                                   dda 05/16/04
                                                                         ir/jxs
                                                               updt jxs 5/07/07