This powerful F4 flight controller by HobbyWing, plus Betaflight OSD stacked on the included 20A 4-in-1 ESC makes for an easy, minimal solder, race-ready high quality solution to a micro quad (20mmx20mm) 2-3″  propeller design! You can’t loose with this micro (20×20) stack. Just add a frame, motors, and FPV and you are good to go!