TuneRC Poly F405 is a lightweight AIO board designed for smaller 2–3" drones powered by 2–4S LiPo batteries. The board is built on the STM32F405 processor with a BMI270 gyro. It is equipped with 8MB memory for Blackbox and a 5V/2A BEC. For easy soldering, it has large solder pads. An I2C bus is available for connecting a barometer or compass. The flight controller can be used with analog and digital video transmission. The flight controller is complemented by integrated regulators that can handle 20A of current. The regulators use Bluejay firmware. They have a built-in current sensor. The board has mounting holes of 25.5×25.5mm and a weight of 6.1g.