This HAKRC F722 2 - 6S AIO Whoop/Toothpick Flight Controller is perfect for quadcopter hobbyists. It comes with an F722 flight controller and 40 Amp ESC on board. The board is 32x32mm with mounting holes sized 25.5mm - 26.5mm. It has internal and external USB ports. Input voltage for both flight controller and ESC is 2S - 6S. Use it to build your own high - performance quad and enjoy smooth flying experiences.