This is the tune for Betaflight 4.1 that the pre-built HD1 kwads ship with. It is a conservative tune that will work for a wide range of experience level, flying style, and drone condition.
This tune uses RPM filtering. You will need a F4 FC with Betaflight 4.1 (or higher), BlHeli32 ESC's running 32.7 (or higher).
NOTE: This is not a physical item. Simply right-click the image(s) and save for reference.