The R617FS 7 channel receiver uses the highly advanced FASST (Futaba Advanced Spread Spectrum Technology) system to give the ultimate in performance and control, you gain switch-on-and-go operation plus amazing interference rejection.
And no more waiting for a frequency to become clear! As fellow flyers can no longer shoot you down through accidental frequency clashes, this upgrade offers a significant safety increase. Supplied as the standard receiver in Futaba 6 and 7 channel 2.4GHz systems.