This is a hardware review of an interesting product for FPV racers.
This product consists in an integration of mutliple components you would otherwise need to solder and assemble together with lots of wiring, thus saving weight and making a cleaner build.
In brief, it is at the same time:
-a F3 flight controller board (could have been the latest F4 generation but hey, F3 is good enough for my flying skills). The F3 board plugs/unplugs from the ESCs/PDB motherboard. So it can be replaced if needed.