Well,..No,..actually there Were some Extremely 'Crappy' so called Wireless systems in the distant past,..lol
BUT,..this system which is designed in Australia,..IS,..Quite Unique, in that it has the ability to swap Cars and tracks, without the need to Re Configure, once it knows what is what.
There is a video of the guys having a Race on three different Manufacturers tracks, and literally picking their cars up and running to the next track, putting their cars on and driving!
Obviously the 3 tracks would need Scorpius Base stations,..but the system has some Very neat features,..especially for digital use.
It's Worth having a good read of their information.
The unit I posted about allows one to just plug in the Module at the Driver's panel, then go stand Anywhere and Drive !!
An interesting concept, if just for practice and testing !!,..lol
See Here;
http://www.scorpiuswireless.com/