This powerful F4 flight controller by HobbyWing, plus Betaflight OSD stacked on the included 40A 4-in-1 ESC makes for an easy, minimal solder, race-ready high quality solution to a standard 190mm(ish) 5″ propeller design quadcopters! Buy the compatible vTx for a more complete solution from HobbyWing (or use whatever vTx you want). You can’t loose with with standard stack.