The D-Rc F405 V4 Flight Controller is a high-performance flight controller designed for racing drones. It features the STM32F405RGT6 CPU and ICM42688P gyroscope, providing fast and accurate control. It supports multiple protocols such as ELRS, CRSF, S.BUS, FrSky, Futaba, and DSMX, making it highly adaptable. With a built-in OSD, 16MB BlackBox, and SPL06 barometer, this flight controller ensures smooth operation, precise telemetry, and reliable performance. It also supports DJI O3, dual camera switching, and has UART ports for various extensions.