##Betaflight 3.4 - Flight Performance Edition
This is a flight performance release of betaflight 3.4. It adds the features AbsoluteControl and SmoothingFilter to F3 flight controllers. To make flash space available the AcroTrainer, FPort, PPM and PWM RX support was removed.
See https://github.com/betaflight/betaflight/wiki/Tuning-Tips-for-Betaflight-3.4 for an explanation of these new features.