4.2RPM Filters - Config

Now you just need to put these numbers into the correct fields in Betaflight.

Connect your drone to Betaflight again and navigate back to the "PID Tuning" tabs "Filter Settings" section.

1. Set the "Gyro RPM Filter Harmonics Number" (#1) to the amount of lines you counted.
2. Set the "Gyro RPM Filter Min Frequency (Hz)" (#2) to the lowest frequency that you have written down before.

If you have troubles finding these inputs, take a look at the attached image.