TuneRC Poly F405 2S-4S AIO Flight Controller - 25.5 X 25.5


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Versatile and High Performance AIO for Micro Community

This Poly F405 2S-4S AIO is designed for FPV micro community and it’s made to be super versatile, so pilots can use this AIO board in different builds like agile toothpick or long range quad or creative X6/X8 quads. So this AIO board is integrated blackbox, current meter and features 5 UARTs to suit needs for different builds. Apart from versatility, we have made this AIO board high performance to make sure it could hold up well on powerful quads. To achieve this goal, this AIO board comes with powerful F405 chip and high quality 20A mosfets and excellent heat dissipation ability.

Hardware Specs

  • FC MCU: STM32F405RGT6( Cortex®-M4 168Mhz )
  • Built-in OSD: AT7456E
  • Built-in IMU: BMI270
  • Built-in 4MByte Blackbox
  • Built-in Current Meter
  • ESC MCU: EFM8BB21 ( 8bit 50MHz )
  • UART: UART1 ( for VTX by default ), UART2, UART3, UART4 ( supports SBUS ), UART5 
  • Other interfaces: IIC ( IIC2 ) , LED_Strip, Buzzer
  • The through holes for power lead: big enough to fit 16AWG wire
  • 8 Motor Outputs ( The onboard esc have been used for 4 motor outputs. You can add 4 external esc if you want to use the other 4 motor outputs )

Electronics Specs

  • Input Voltage: 6.50-20.0V( 2S-4S LIPO/LIHV )
  • Power Output: 5V 2A
  • Continuous Current: 20A
  • Peak Current: 28A


  • FC Target: TUNERCF405
  • ESC Firmware: Bluejay P-H-25

Motor Size Supported

  • 11xx, 12xx, 13xx, 14xx

Recommended Capacitor 

  • A 35V 220uf capacitor is included. A 35v 220-470 uf capacitor with low ESR is recommended if you want to swap the default one.


  • Size: 33mm x 33mm
  • Mounting Holes Pattern: 25.5 x 25.5mm   Room for M3.5 grommets to make M2 mount
  • Weight: 5.8g

In the box

  • 1 * Poly F4 1-2S AIO
  • 1 * XT30 pigtail with 20awg wire
  • 1 * 35V 220uf capacitor 
  • 6 * black grommets

Wiring Diagram

Versatility Makes Possibility for Different Builds

5UARTs Available | 8 Motors Output | Blackbox and Current Meter Onboard

The Poly F405 AIO board has 5 UARTs available and many interfaces, you can take advantage of them to add external buzzer, GPS module, barometer and etc. Furthermore, this board also features EIGHT motor outputs, definitely a perfect option for x8 quad fans! And for sure, we don’t forget advanced users, 4MB blackbox and current meter are already onboard for Betaflight tuning.

High Performance for Better Flying Experience

F405 MCU | FD6288 chip | High Quality 20A Mosfets
With fast 168MHz processing power and 1MB flash memory, F405 chip is a strong core of the AIO board, you could enable RPM filtering or dynamic idle and other features in Betaflight without worrying about if the MCU is overload.
FD6288 chip and high quality 20A mosfets and excellent heat dissipation design make this aio board hold up well for hardcore freestyle flying.

Preflashed with Bluejay

Bluejay is an open source esc firmware. One of the appealing features it comes with is Bidirectional Dshot and RPM filtering, which can improve flight performance a lot. Kudos to devs from Bluejay for their hard work. You can find more detailed information on Github or join their discord for discussion.

F405 is a good balance in terms of frequency, memory and IO

Compared with F405 and F722, F405 has strikingly good performance on flash memory. Since Betaflight is developing fast and packed with more features, the limited 512K flash memory of F411 and F722 is becoming insufficient for Betaflight, the devs from Betaflight have to cram the Betaflight to F411 and F722. The larger flash memory of F405 is good for devs and pilots alike.

Note: “IO” stands for input and output.

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