Flight controller F4 with integrated receiver FrSky XSR
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The F4 runs the software which was developed by FrSky and base on the BTFL, please choose the board of FrSky F4 to update the software in Betaflight GUI.
The XSR receiver runs the software which was developed by FrSky and firmware upgradeable.
For more information and manual, go to the folder Download or click HERE.