The FGr4B receiver is the ideal support for a Flysky remote control. This receiver uses a technology found in many Flysky transmitters: the Automatic Frequency Hopping Digital System (AFHDS3). With bidirectional transmission via the antenna, this receiver is specially designed for the installation and output of PWM/PPM/i-BUS/S.BUS signals. All AFHDS3-compatible transmitters are supported.