# SpeedyBee F405 V4 BLS 55A 30x30 FC & ESC Stack

![SpeedyBee F405 V4 BLS 55A 30x30 FC & ESC Stack](https://parts.trymaglev.com/img/dr-speedybee-f405-v4-stack.webp)

Very common low-cost Betaflight FPV stack (F405 FC + 55 A BLHeli_S 4-in-1); now marked discontinued by the maker.

- Maglev ID: dr-speedybee-f405-v4-stack
- Brand: SpeedyBee
- MPN: SB-F4V4-55-STACK
- Category: drone / Flight Controllers & Autopilots
- Origin: CN (maker HQ, factory not confirmed)
- Maker: SpeedyBee (Zhuhai KuaiFeng Technology Co., Ltd.) (brand, CN)
- NDAA: non-compliant · Blue UAS: not-listed · FCC: n/a
- HTS: unknown (typical)
- MOQ: 1 · Lead time: unknown
- Confidence: VERIFIED

## Price
- 1+: $65.99 (list, 2026-10-29, https://www.speedybee.com/speedybee-f405-v4-bls-55a-30x30-fc-esc-stack/)

## Specifications
- Processor: STM32F405
- IMUs: 1x ICM42688P
- Weight: 10.5 g FC (ESC 23.5 g)
- Interfaces: 6 UARTs (UART4 Bluetooth, UART5 ESC telemetry), baro, AT7456E OSD; 3-6S

## Links
- Product: https://www.speedybee.com/speedybee-f405-v4-bls-55a-30x30-fc-esc-stack/
- Datasheet: https://store-fhxxhuiq8q.mybigcommerce.com/product_images/img_SpeedyBee_F405_V4_Stack/SpeedyBee_F405_V4_Stack_Manual_EN.pdf
- CAD: none

## Equivalents
- ARK Electronics ARK FPV Flight Controller (dr-ark-fpv)
- Matek H743-WING V3 (dr-matek-h743-wing-v3)

## Works with
- iFlight XING2 2207 1855KV FPV Motor (dr-iflight-xing2-2207-1855kv)
- HQProp Durable 5x4.3x3 V1S (2CW+2CCW) (dr-hqprop-5x4-3x3)
- SpeedyBee BLS 55A 4-in-1 ESC (F405 V4 stack ESC) (dr-speedybee-bls-55a-4in1)
- RadioMaster RP1 V2 ExpressLRS 2.4 GHz Nano Receiver (dr-radiomaster-rp1-v2)

## Sources
- https://www.speedybee.com/speedybee-f405-v4-bls-55a-30x30-fc-esc-stack/ (FC + ESC specs, SKU, price, maker name)