Sub250 Redfox A2 is an AIO board that integrates a flight controller, ESCs and ELRS receiver. The board can be powered by a 1-2S battery and is thus particularly suited for 1.6-2" drones with both analog and digital video transmission. The flight controller is based on the F411 processor with BMI270 gyro. ECSs with BlHeli_S firmware can handle current up to 12A and are thus suitable for combination with motors of size 1002/1103 and similar. The ELRS receiver is connected via UART and uses a frequency of 2.4GHz. The antenna is connected via an IPEX4 connector. The board also includes a barometer and 8MB blackbox memory.