Speedybee F405 Mini is a flight controller suitable for 2-4" drones. The controller is packed with features. The basis of the FC is F405 processor with a ICM42688P gyro. The main advantage of the board is the integrated bluetooth module for wireless setup, integrated barometer. There is a 5V and 9V BEC as well as 8MB of memory for the blackbox. An interesting feature is also the 4 LEDs on the edge of the board that indicate the battery status. This way you can see at a glance if you are putting a discharged battery in the drone. Thanks to two softmount kits, the board is compatible with both M2 and M3 screws.