Futaba 7C 2.4GHZ R617FS Transmitter/Receiver 4-S3152 for Helicopters FEATURES: Futaba's FASST (Futaba Advanced Spread Spectrum Technology) shifts very quickly virtually eliminating signal conflicts and interruptions INCLUDES: Futaba 7C 2.4GHz Transmitter 600mAh 9.6V NiCd Transmitter Battery R617FS FASST 7-Ch Receiver REQUIRES: 4.8V receiver battery of modeler's choice