BetaFPV F4 2-4S 12A AIO Brushless Whoop Flight Controller for Beta75X & 85X

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3rd (Latest) Version

This the long awaited 4S capable AIO FC from BetaFPV. Light weight (5.6g) and easy installation make this a great choice for lots of whoop builds, but it was specifically designed for the X series. (75X and 85X) The integrated 4S capable 12A Blheli_S 4in1 ESC will allow your whoop to generate incredible thrust (with the appropriate motors)

Check out all our Whoop FCs, and our BetaFPV product line!




    • CPU: STM32F411CEU6 (100MHZ )
    • Six-Axis: MPU6000 (SPI connection)
    • Size: 26mm x 26mm, whoop mounting pattern
    • Firmware version: Betaflight MATEKF411 (MK41)
    • OSD: Built-in BetaFlight OSD (STM32 controls OSD chip over SPI in DMA mode)
    • Receiver: Support Frsky XM/XM+ Receiver/ Futaba Receiver/ Flysky Receiver/ TBS Crossfire Receiver. Add Frsky R9M Receiver and BETAFPV Micro DSMX Receiver (Don't support DSMX RX with 3.3V solder pad ) since V1.2.
    • Support programmable LED like WS2812 etc
    • Built-in current sensor
    • Weight: 6.2g


    • Support BLheli/BLHELI_S suite Pass-through ready
    • Support PWM, Oneshot125, Oneshot42, Multishot, Dshot150, Dshot300, Dshot600
    • Input voltage: 2S-4S Lipo
    • Continue current: 12A
    • Peak current: 13A
    • Firmware: BLHELI_S
    • Processor: SILABS EFM8BB21F16G
    • Motor Connectors: 1.25mm header pins connector
    • Factory firmware: G-H-30-16.7


    • 1x F4 2-4S brushless flight controller with XT30 Plug
    • 4x M1.2x4mm screws
    • 4x M1.4x5mm screws
    • 4x Anti-vibration rubber dampers

    Could the ESC on this AIO board support really 4S battery?

    Yes. But please pay more attention to the motors. Here are two situations that the motor will burn itself and then the ESC frequently. 

    Situation 1: The motor's KV value is too high and could not stand the 4S power. For example, the BETAFPV 1105 6000KV motors could not stand the 4S power in aggressive flying. So we are working on a lower KV 1105 motor that could use with 4S battery. It will be released soon.

    Situation 2: A poor quality motor will result in the fire accident in 4S power.

    For the moment, no 0x0x/1102/1103 motors could stand 4S power for the moment in the market. Please make sure your motors could support the 4S battery before any try.


    F4 2-4S AIO Brushless Flight Controller 12A (BLHeli_S)

    F4 2-4S AIO Brushless Flight Controller 12A (BLHeli_S)



      Here is the connection diagram with Frsky XM+ receiver.

      Here is the connection diagram with FS-RX2A receiver.

      Here is the connection diagram with Futabe-X-BOSS AC900 receiver.

      Here is the connection diagram with TBS Crossfire receiver.

      Here is the connection diagram with DSMX FullSpeed receiver.

      Status LED

      There are 3 LEDs on the bottom of the board to indicate the status, including Receiver LED ( Green), FC Status LED ( Blue ) and FC Power LED ( Red ). 

      LED  Status  Description
      Mode LED (Green)  Solid Horizon Mode/ Angle Mode
      Mode LED (Green)  Extinguished Acro Mode
      Power LED (Red)  Solid  Power on
      Status LED (Blue)  Solid  Motor Armed

      Built-in Current Meter

      This is our first whoop FC board that have current sensor built-in. So no need to use the virtual current meter and you could get a more accurate current value. In order to use this current sensor hardware, some configurations in Betaflight GUI are needed. In the "Power & Battery" tab:

      Then when flying, you could find the real current value from the OSD information. Of course, the current sensor is configured well in the factory and you do not need to change it as usual.

      Know more about current sensor and calibration.