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Happymodel ExpressLRS ELRS F4 5A 5-in-1 AIO FC w/ Built-in 2.4GHz Rx


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The Happymodel ExpressLRS F4 is the world's first AIO 5-in-1 whoop flight controller with a built-in high-performance 2.4GHz ELRS receiver. This F4 flight controller has a built-in 5A ESC, 5.8GHz VTX, and OSD. It is made for 1S long-range and tiny whoops.

This FC integrates an SPI-controlled 2.4GHz ExpressLRS receiver, Dshot protocol 4-in-1 ESC, 5.8GHz 40ch video transmitter, and Betaflight OSD. Ultra-small size and ultra-stable remote control range can improve the range of the original SPI receiver. The 2.4GHz ExpressLRS receiver is equipped with the SX1280 radio frequency chip with high sensitivity, high packet rate, and low latency, making this flight controller the one that all Race/Freestyle pilots need! Suitable for use in Tiny Whoop or Toothpick Freestyle, and can also be used in 1S ultra-lightweight Nano Long Range platform.


  • 2.4GHz ExpressLRS receiver is equipped with the SX1280 radio frequency chip with high sensitivity, high packet rate, and low latency
  • Onboard SPI-controlled 2.4GHz ExpressLRS receiver
  • Ultra-small size and ultra-stable remote control range
  • Onboard Voltage and Amperage meters
  • World's first 5-in1 AIO FC w/ Receiver
  • 5.8GHz 40ch video transmitter
  • Dshot protocol 4-in-1 ESC
  • Onboard 4-in-1 ESC
  • F4 Flight Controller
  • Betaflight OSD

More Info HERE

Note: Do not allow the antenna plug to touch the Motor soldering pins, as it may burn the ESC.


  • Bind with: Happymodel ES24TX, ES24TX Lite, ES24TX Slim, and DIY 2.4GHz ELRS TX module(need to flash the same version ELRS firmware)
  • Packet Rate option: 25Hz/50Hz/150Hz/250Hz/500Hz
  • Receiver protocol: SPI ExpressLRS
  • Telemetry output Power: <12dBm
  • Antenna: SMD antenna
  • RF Frequency: 2.4GHz


  • Built-in 5V 1A BECFlight controller firmware target: CRAZYBEEF4SX1280
  • Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready
  • MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
  • Power supply: 1S battery input (DC 2.9V-4.35V)
  • Built-in SPI ExpressLRS 2.4GHz receiver
  • Sensor: MPU-6000(SPI connection)
  • Built-in Betaflight OSD(SPI Control)
  • Original whoop size compatible
  • Built-in 5.8G VTX


  • Frequency: 5.8GHz 5bands 40 channels (include Race band) Smart audio ready
  • Output power: 25mw~200mw switchable
  • Current consumption: 300mA(type)
  • Input voltage: 3.3V 5.5V
  • Frequency: 40CH


  • Power supply: 1S LiPo/LiPo HVCurrent: 5A continuous peak 6A (3 seconds)
  • Factory firmware: O_H_5_REV16_8.HEX
  • Support BLHeliSuite programmable
  • MCU upgraded to EFM8BB21
  • Default protocol: DSHOT600


  • Amperage meter scale setting 1175
  • Voltage meter scale setting 110


  • 1x Happymodel ExpressLRS F4 5A 5-in-1 AIO FC w/ Built-in 2.4GHz Rx
  • 1x Connecting Wire
  • 1x Dipole Antenna
  • 4x Damping Balls
  • 1x 3-Pin Wire
  • 5x Screws

None Available

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