App wireless flight control & ESC full parameter adjustment Fix SD card compatibility issues Built-in barometer Flight control onboard 4-level battery indicator Gyroscope dual power supply filter<br><br>Main controller: STM32F405 Gyroscope: ICM42688P USB interface type: Type-C Barometer: built-in OSD chip AT7456E Bluetooth BLE: supported, used to connect to SpeedyBee App to set flight control and ESC parameters. Please make sure that the MSP switch of serial port UART4 is turned on and the baud rate is set to 115200, otherwise the Bluetooth function cannot be used WIFI: not supported DJI Air Unit connection method: supports 6-pin socket direct plug-in and solder wire connection. 6-pin DJI air end direct socket support: fully compatible with DJI O3/RunCam Link/Caddx Vista/DJI Air Unit V1, no need to change any line sequence. Galvanometer: supported (Scale=400,Offset=0) Colour:As Shown Material:PCB type:55A<br><br>Package Contents: 1 x F405 V4 Flight Controller Stack Kit<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.