The NewBeeDrone BeeBrain BLV4 F411 1-2S AIO Whoop/Toothpick Flight Controller is designed for pilots who want a compact and powerful drone. It's perfect for both indoor and outdoor flying. The flight controller measures 29x29x7.6mm and weighs 6.5g (including antennas and battery connector). It comes with a built-in TBS Crossfire Nano receiver, SmartMAX technology, and a 25x25 mounting pattern. The VTX has switchable output power from 5mw-25mw (for racing) - SmartMAX (up to 400mw) with a BeeTX 5.8Ghz antenna. The 12A BLHeli_S ESC provides smooth and reliable power. The BMI270 gyro ensures stable flight. This flight controller is a great choice for anyone looking to build a high-performance drone.