The SpeedyBee F405 V4 is quickly becoming one of the most popular flight controllers in the FPV community. With its combination of powerful specs, wireless tuning, and competitive pricing, it’s built for pilots who want great performance without breaking the bank. In this review, we’ll explore whether the F405 V4 is right for you, how it compares to the previous version, and where to buy it.
Is SpeedyBee F405 V4 good?
If you are wondering: Is SpeedyBee F405 V4 good? The short answer is: absolutely yes.
Whether you’re building your first 5-inch freestyle quad or upgrading your long-range drone, the F405 V4 delivers a combination of:
- Fast and stable flight performance
- Built-in wireless tuning via Bluetooth
- Reliable hardware with smart extras like a barometer and onboard Blackbox
- Support for both analog and digital FPV systems
It’s everything you need for a modern FPV rig, and it comes at a price point that’s hard to beat.
Where to buy Speedybee F405?
Looking for a legit source to grab your F405 V4? You can purchase the flight controller (and stack combo) from several trusted FPV retailers. One recommended option is: SpeedyBee F405 V4 55A FC & ESC Stack at MEPSKING.
This site offers genuine SpeedyBee products, fast international shipping, and great customer support — perfect for both hobbyists and professional drone builders.
It also offers SpeedyBee F405 V4 60A FC & ESC Stack for high-performance FPV racing and freestyle builds.
Key Features of the SpeedyBee F405 V4
Here’s a detailed breakdown of why this flight controller is so popular:
- STM32F405 MCU
The STM32F405 chip is the heart of this board. It provides more than enough processing power to run Betaflight, INAV, or EmuFlight with all features enabled, including RPM filtering, OSD, and GPS.
- USB-C & Bluetooth Connectivity
No more fiddling with outdated Micro-USB cables — the F405 V4 uses USB-C, offering faster data transfer and a more durable connection. Even better, it features built-in Bluetooth, so you can configure your drone on the go using the SpeedyBee App without ever plugging it in.
- 500MB Blackbox
Flight data is essential for tuning, and this board includes a massive 500MB onboard flash for Blackbox logging — far beyond the typical 16MB or 32MB you’ll find in other FCs.
- Integrated Barometer
Altitude-based features like Return-to-Home or altitude hold require accurate height readings. The V4 includes a built-in barometer, making it a great choice for GPS-equipped long-range quads.
- Stackable Design with 55A BLS ESC
If you choose the full stack combo, you’ll get a 55A 4-in-1 BLS ESC that pairs perfectly with the flight controller. It supports up to 8S input voltage, making it suitable even for power-hungry builds.
- DJI & Analog FPV Support
The board has dedicated pads and firmware support for both DJI O3 / Air Unit / Vista systems and traditional analog FPV cameras and VTXs.
- 6 Full UARTs
With 6 UARTs, you have more than enough ports for your GPS, ELRS/CRSF receivers, SmartAudio, VTX, and even external modules like Bluetooth/GPS trackers or HD OSD.
Why Choose the SpeedyBee F405 V4?
Worth for the Money
The SpeedyBee F405 stack’s unparalleled value has always been its most notable feature. A feature-rich flight controller and a respectable 4-in-1 ESC that can compete with more expensive options are yours for $65.99. With the release of the V4, the ESC is upgraded from 50A to 55A, and the FC receives a number of improvements.
Quality of Design and Construction
The V4 and the V3 may initially appear to be similar because of their dark PCB color and the recognizable yellow rubber gummy for gentle attachment. With sizable solder pads that are convenient to work with, the board layouts are quite comparable.
Setting Up Wireless
Nearly all of SpeedyBee’s flight controllers, regardless of price, come with built-in Bluetooth modules. With the “SpeedyBee” app on their phones, customers can wirelessly configure their ESC and flight controller thanks to this capability. This feature removes the need for a computer and makes PID tuning in the field simple and rapid.
FPV System Compatibility
This stack’s adaptability is ensured by its compatibility with both digital and analog OSD. All of the DJI video transmitters, including the DJI O3, Full Size Air Unit, and Runcam Link (Caddx Vista), may be used with the V4 flight controller. Cables for each of these VTXs are included in the kit.
Additionally, this FC works with all other HD systems, including HDZero and the Walksnail Avatar. However, some systems do not come with cords, so you may need to solder additional wires yourself.
What is the difference between SpeedyBee F405 V3 and V4?
The SpeedyBee F405 V4 is more than just an incremental upgrade over the V3. Here’s a side-by-side comparison to show you exactly what’s new:
| Feature | F405 V3 | F405 V4 |
| USB Port | Micro-USB | USB-C |
| Bluetooth | Basic | More stable and seamless pairing |
| Blackbox Storage | 16MB–128MB | 500MB onboard flash |
| Barometer | No | Yes |
| ESC Support | Up to 6S | Up to 8S (with 55A ESC stack) |
| App Control | Yes | Improved compatibility & speed |
The V4 improves on nearly every aspect, especially in connectivity, logging, and stack performance.
How to Update SpeedyBee F405 V4
Keeping your firmware up-to-date is important for bug fixes and new features. Here are two ways to update the F405 V4:
Method 1: Betaflight Configurator (Wired)
- Connect the board via USB-C to your computer
- Open Betaflight Configurator and select the correct COM port
- Go to the Firmware Flasher tab, choose STM32F405
- Load the latest firmware and click “Flash Firmware.”
Method 2: SpeedyBee App (Wireless)
- Power up your quad with a LiPo battery
- Open the SpeedyBee App and connect via Bluetooth
- Tap “FC Firmware Update.”
- Select your board and firmware version
- Start the wireless update
Does SpeedyBee F405 V4 support bidirectional DShot?
Yes, the F405 V4 fully supports Bidirectional DShot, which is essential for enabling RPM filtering in Betaflight. This results in:
- Smoother flight performance
- Reduced prop wash
- Faster ESC feedback for filtering algorithms
For serious freestyle or racing pilots, this is a must-have feature.
Who Should Use the SpeedyBee F405 V4?
This board is ideal for:
- Freestyle pilots looking for wireless tuning and fast logging
- Long-range drone builders using GPS + barometer + Blackbox
- DJI digital FPV users who want clean OSD integration
- Analog FPV pilots who want advanced features at a great price
- Beginners who need an easy setup and mobile app support
Frequently Asked Questions (FAQs)
Q: Can I use this with DJI O3?
A: Yes, the F405 V4 is fully compatible with DJI digital video systems.
Q: Is the 55A ESC included?
A: Only if you buy the full stack. Make sure to check product details before purchasing.
Q: Is this good for a 5-inch freestyle build?
A: Absolutely. It’s one of the best value flight controllers for 5″ freestyle and cinematic drones.
Q: What firmware does it support?
A: It supports Betaflight, INAV, and EmuFlight.