Happymodel Pancake AIO 2-6S 4-In-1 Flight Controller/ELRS RX/VTX

  • $49.99
    Unit price per 


The Happymodel Pancake AIO is an F4 Flight Controller with built-in ExpressLRS 2.4GHz receiver and 48 channel 400mW 5.8GHz video transmitter.  With support for both 20x20 and 35.5x35.5 mounting holes, this is one amazing board packed with features.


  • Betaflight firmware target: CRAZYBEEF4SX1280
  • VTX antenna: U.FL
  • Receiver antenna: Ceramic antenna
  • Weight: 5.2g
  • Built-in SPI ELRS 2.4GHz receiver
  • Built-in OPENVTX max power up to 400mw
  • Compatible with 20×20 or 35.5×35.5 4-IN-1 ESC


  • Firmware Target: CRAZYBEEF4SX1280
  • MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
  • Sensor: MPU6000 (SPI connection)
  • Mount hole type: 20×20 or 35.5×35.5
  • Power supply: 2-6S battery input
  • Built-in Betaflight OSD(SPI Control)
  • Built-in 5.8G OpenVTX 0mw~400mw
  • Built-in ExpressLRS 2.4G ELRS V2.0 firmware compatible


  • Packet Rate option: 50Hz/150Hz/250Hz/500Hz
  • Support ExpressLRS v2.0 or latest
  • RF Frequency: 2.4GHz
  • Antenna : SMD ceramic antenna
  • Telemetry output Power: <12dBm
  • Receiver protocol: SPI ExpressLRS
  • Compatible with ExpressLRS V2.0 TX Module
  • Couldn’t flash separately ExpressLRS firmware


  • Firmware version: OPENVTX
  • Smartaudio v2.1
  • PIT Mode support
  • RCE Mode support
  • Channels:48ch
  • Transmitting Power: 0/RCE/25mw/100mw/400mw
  • Power supply: DC 5V
  • Current (5v): <650ma (400mw)
  • Antenna connector: U.FL

1x Happymodel Pancake AIO 2-6S 4-In-1 Flight Controller/ELRS RX/VTX
1x XT30 Cable
1x Wiring Harness
4x Vibration Dampening Grommets
4x Mounting hardware
1x 5.8GHz Antenna



The use and operation of this type of product in the USA and many other countries may require a license and some countries may forbid its use entirely. In the USA, you will need a "HAM" amateur radio license. Learn more about HAM licenses, and find a HAM license exam session in your area. It is your responsibility to ensure that the use of this product meets the requirements imposed by your government's rules and regulations for RF devices. Do not purchase this product if you are unsure of the government requirements or are not able to comply with them. Defiance RC, Inc cannot be held responsible for your actions if you purchase and/or use this product in violation of your government's regulations. By agreeing to our terms and conditions during the check-out process, you also agree to have read and to understand this notice.

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