USB Interface Programming Board and Cable Requires 7168.S (USB Adapter Cable) to connect to RX, ESC etc.   You can find the Graupner update studio HERE 

OVERVIEW  Measure motor temperatures and main pack voltage in realtime with the Graupner Temperature and Voltage Sensor.  Connect directly to surface receivers (i.e. GR-4, GR-8) and surface radios (i.e. X-8N, X-8E) to provide visual and audible warnings when temperature/voltage thresholds have been reached.   ...

A new series of propellers specially designed for electric power systems. These high-strength glass-reinforced plastic propellers feature exceptionally good torsional rigidity in spite of their ultra-thin, low-drag profile and high aspect ratio blades. For every propeller size there is an exactly matched counterpart for...

USB Adapter Cable for Updating Receivers, Modules and ESC