The OrangeRx GR400S ground receiver has all the properties and features of the original FASST compatible receivers in the OrangeRx brand but this one now operates on the later Futaba S-FHSS and FHSS (Frequency Hopping Spread Spectrum) system. This receiver has 2 operating modes, "Normal Mode" (FHSS) accepts any type of servos and peripherals with a 13.6ms frame rate or higher. "High Speed" mode (S-FHSS) only accepts digital servos and peripherals with a 6.8ms frame rate. These modes are auto detected by the receiver during the binding process.

The S.Bus functionality is an excellent feature which reduces the amount of leads and wiring when using multiple servos.