---
product_id: 149850167
title: "Happymodel Crazybee F4 Pro V2.1 2-3S Compatible Flight Controller for Sailfly-X FPV Racing Drone with Frsky Receiver Version"
brand: "happymodel"
price: "$164.31"
currency: USD
in_stock: true
category: "Toys And Games"
url: https://www.desertcart.ec/products/149850167-happymodel-crazybee-f4-pro-v2-1-2-3s-compatible-flight
store_origin: EC
region: Ecuador
---

# Happymodel Crazybee F4 Pro V2.1 2-3S Compatible Flight Controller for Sailfly-X FPV Racing Drone with Frsky Receiver Version

**Brand:** happymodel
**Price:** $164.31
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Happymodel Crazybee F4 Pro V2.1 2-3S Compatible Flight Controller for Sailfly-X FPV Racing Drone with Frsky Receiver Version by happymodel
- **How much does it cost?** $164.31 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/149850167-happymodel-crazybee-f4-pro-v2-1-2-3s-compatible-flight)

## Best For

- happymodel enthusiasts

## Why This Product

- Trusted happymodel brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Edition:with Frsky receiver Version
            
          
          
        
      
    
  


        
        
     
	       
     

     
                              
     
       	       
        
         
        
        	
        	
        		
        			Product description: Happymodel Crazybee F4 Pro V2.1 2-3S Compatible Flight Controller for Sailfly-X FPV Racing Drone Frsky·Flysky·DSM/2·DSM/X Protocol RX  Flysky receiver Version:  SPI BUS receiver Protocol: AFHDS and AFHDS-2A Switchable Channels: 8ch(AFHDS) or 14ch(AFHDS-2A) No ground interference ( Transmitter and receiver 1 m from the ground): 300m Failsafe support  Frsky receiver Version:  SPI BUS receiver Frsky D8/D16 switchable Compatible both Non EU and EU-LBT transmitter Channels: 8ch or 16ch EU-LBT support(need to update betaflght v4.0 date 2019-04-11) Failsafe support No ground interference ( Transmitter and receiver 1 m from the ground): 300m DSM/2·DSM/X receiver version:  Serial bus receiver Protocol: DSM/2·DSM/X compatible Channels:6-9 (Depend on your radio) No ground interference ( Transmitter and receiver 1 m from the ground): 300m PNP No RX version:  Serial bus receiver Protocol: DSM2/DSMX compatible Channels:6-9 (Depend on your radio) No ground interference ( Transmitter and receiver 1 m from the ground): 300m  controller:  (Frsky version) CRAZYBEE F4FR PRO V2.1 Firmware target: CrazybeeF4FR (Flysky version) CRAZYBEE F4FS PRO V2.1 Firmware target: CrazybeeF4FS (DSM/2·DSM/X version) CRAZYBEE F4DX PRO V2.1 Firmware target: CrazybeeF4DX (No RX version) CRAZYBEE F4 PRO V2.1 Firmware target: CrazybeeF4DX MCU:STM32F411CEU6 (100MHZ, 512K FLASH) Sensor: MPU-6000(SPI connection) Board size: 28.5 * 28.5MM Power supply: 2-3S battery input (DC 7.4-13V) Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready  Onboard 4in1 ESC:  MCU upgraded to EFM8BB21 Power supply: 2-3S LiPo/LiPo HV (7.4v/13v) Current: 5A continuous peak 6A (5 seconds) Support BLHeliSuite programmable Factory firmware: S_H_50_REV16_7.Hex Default protocol: DSHOT600

## Features

- with Frsky receiver Version
- Frsky version Built-in SPI Frsky receiver with telemetry(D8/D16 switchable)
- Controller: (Frsky) CRAZYBEE F4FR PRO V2.1 Firmware target: CrazybeeF4FR
- Power supply: 2-3S battery input (DC 7.4-13V)
- Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready

## Images

![Happymodel Crazybee F4 Pro V2.1 2-3S Compatible Flight Controller for Sailfly-X FPV Racing Drone with Frsky Receiver Version - Image 1](https://images-na.ssl-images-amazon.com/images/I/41yM3CJrdFL.jpg)
![Happymodel Crazybee F4 Pro V2.1 2-3S Compatible Flight Controller for Sailfly-X FPV Racing Drone with Frsky Receiver Version - Image 2](https://images-na.ssl-images-amazon.com/images/I/41y0FSyqd8L.jpg)

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**Shop now:** [https://www.desertcart.ec/products/149850167-happymodel-crazybee-f4-pro-v2-1-2-3s-compatible-flight](https://www.desertcart.ec/products/149850167-happymodel-crazybee-f4-pro-v2-1-2-3s-compatible-flight)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-06-20*