I am guessing that you are talking about the new park flyer spread spectrum system. Your link ran on to a sentance and does not work.

They first arrived with surface radios and now this new park flyer system has hit the market. It operates on a much higher frequency band and I will leave a tech explination to someone more capable but there are issues with antenna radiation in the environment we operate in and this unit is only for park flyers with a very limited range. It would not at all be usable for the type airplanes you are flying. We can hope in the future though[8D]

John