The technology is different also. At the moment there are 2 2.4GHz systems suitable for roboteering because they have programmable failsafe settings on all channels.

The first is the Spektrum DX series with BR6000

The second is the XPS system from Extreme Power systems which Graupner is now also selling in Europe under a different name.

http://www.graupner.de/en/freie-artikel/graupner-ifs-das-24-ghz-system-von-graupner.htmlhttp://www.graupner.de/en/freie-arti...stem-von-graup ner.html