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Description
Sub250 Redfox A3 F722 35A/45A 4in1 AIO Flight Controller for 2 to 3.5 inch Drones - Choose VersionIntroducing the Redfox A3 series flight controller, a new choice in lightweight FPV drones brought to you by the Sub250 team. Designed specifically for 2 to 3. 5 inch drones, it integrates the powerful computational capabilities of the F722 MCU to ensure exceptional flight performance. Featuring an independently designed Type C adapter board, it can be conveniently placed at any location on the frame for quick parameter adjustments. Onboard DJI 6 Pin
Introducing the Redfox A3 series flight controller, a new choice in lightweight FPV drones brought to you by the Sub250 team.
Designed specifically for 2 to 3.5-inch drones, it integrates the powerful computational capabilities of the F722 MCU to ensure exceptional flight performance.
Featuring an independently designed Type-C adapter board, it can be conveniently placed at any location on the frame for quick parameter adjustments.
Onboard DJI 6-Pin interface, offering direct connectivity to digital video transmission systems.
Equipped with four sets of UART ports, providing more possibilities for installation and upgrades. It also comes with a [email protected] BEC to meet the increasing demand for additional peripherals.
Sub250 is committed to combining “lightweight” and “high performance” to bring a brand new experience to the racing drone field. The Redfox A3 series flight controller helps you explore the perfect fusion of lightweight design and exceptional performance.
Check out all our Whoop Style AIO Flight Controllers and the rest of our Sub250 Products!
Features:
- STM32F722 MCU, powerful computing performance with high-speed and real-time response.
- Reliable and durable BLHeli_32 35A/45A ESC supports up to 128khz PWM frequency.
- Independently designed DJI 6PIN interface, directly connected to DJI digital video transmission system.
- TypeC adapter board with boot button, SH1.0 5PIN direct plug, meeting the placement needs of various kinds of small frames.
- 4 sets of complete UART ports provide more possibilities for installation and expansion, and the optimized pad design makes welding easier.
- [email protected] BEC meets the demands of more peripheral devices.
- Supports functions such as OSD parameter adjustment, GPS, LED, buzzer, etc.
- Ultra-light weight of 8.7g, 25.5mmx25.5mm M3 mounting holes, suitable for most frames on the market.
FC Specifications:
- MCU: STM32F722
- IMU: ICM42688-P
- Firmware Target Name: SUB250REDFOX722AIO
- OSD Chip: AT7456E
- Barometer: Built-in
- UART: 6 sets (UART1, UART2, UART3 for Digital VTX SBUS receiver, UART4, UART5 for ESC telemetry, UART6)
- External Buzzer: Supported
- External LED: Supported
- 6-Pin DJI Air Unit Plug: Supported
- USB Port Type: SH1.0 5PIN to Type-C
- BEC Output: 5V 2.5A
- Mounting: 25.5mm x 25.5mm, φ3mm hole reduces to φ2mm with Anti-vibration Silicone Grommet
- Dimension: 33.5mm(L) x 33.5mm(W) x 6.45mm(H) ,1.6mm Board Thickness
- Weight：8.7g
ESC Specifications:
- Continuous Current: 35A/45A
- Burst Current: 45(10s)/55A(10s)
- Power Input: 2~6S (LiPo Battery)
- ESC Protocol: Dshot300, Dshot600
- Current Sensor: Supported
- ESC Firmware: BLHeli_32
Download the Installation Manual Here
Package Includes:
- 1 x Redfox A3 35A/45A AIO
- 1 x External USB-C Port Module (Wire Length:150mm)
- 1 x 6Pin DJI Air Unit Connecting Cable
- 5 x M2*6.5 Black Anti-vibration Silicone Grommets（4 x Pre-installed）
- 5 x M2*6.5 Red Anti-vibration Silicone Grommets
- 5 x M2x10 Screws
- 8 x M2 Nylon Nuts
- 1 x 35V 470uf Capacitor
- 1 x XT30 16AWG 70mm Power Cable
- 1 x Manual & Support Card
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 1102 reviews
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Product Reviews
★★★★★ 5
Blocks
Style: w/ Rope Design, Size: Pack of 2
Great item.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
★★★★★ 5
Great rv wheel chocks
Style: w/ Rope Design, Size: Pack of 2
After ten years, I finally decided to replace one pair of these. They have taken abuse through eleven camping seasons with my rv and I gave them to the new owner when selling my old trailer. I like these because I can use my orange plastic deadblow hammer to get them tight to the wheels. They are pointy so they really get under the tire and stay put. The rope handle makes them easy to pick up and move to the storage bay.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2025
★★★★★ 5
Excellent leveling blocks for our (heavy) Sprinter van
Size: 10.5' x 10.5", Color: Gray, Size: 10.5' x 10.5", Color: Gray
This review is for the FasTen XL 10 pack (10.5" × 10.5", 10 ea.).
We have a 2024 AWD Sprinter van that's been fully converted to a Class B camper. Fully loaded, the van weighs ~ 8,650 lbs, and sits on 265-mm-wide (10.4-inches wide) BF Goodrich AT KO2 tires. The width of the tires were a driving factor in deciding to purchase the XL-sized blocks instead of the standard blocks. In addition, each wheel carries more than a ton of weight, especially in the rear. To be honest, I had my doubts about how well these plastic blocks would stand up to such loads.
I am happy to report that after three weeks of daily use on both dirt and paved surfaces, these blocks have performed very well, showing no signs of cracking or deforming. While in use, the blocks sometimes appear to be bent (and possibly they are, but this could also be an illusion). Nonetheless, when stowing them, the blocks are perfectly flat and stack nicely for easy storage in the van's equipment box. Just knock off the dirt and pebbles, stack them up using the convenient handle, and you're ready to go.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 2, 2025
★★★★★ 5
A Game-Changer for RVers - Camco Fasten XL 2x2 Leveling Block!
Size: 10.5' x 10.5", Color: Gray
As an avid RVer, I can't emphasize enough how the Camco Fasten XL 2x2 Leveling Block has transformed my RVing experience. These leveling blocks are an absolute game-changer, and here's why:
Interlocking Design: The interlocking design is ingenious. It allows for effortless customization of the height needed to level my RV, no matter the terrain. These blocks securely fasten together, creating a solid foundation, and there's no need to worry about them shifting or slipping.
Stability and Durability: These blocks are incredibly sturdy. They can handle the weight of my RV without flexing or cracking. Even on uneven surfaces, they provide a stable platform, ensuring my RV stays level and secure.
Convenience: The Camco Fasten XL blocks are a breeze to use. I appreciate that they come with a built-in handle for easy transportation and storage. Setting them up is quick, saving me time and effort when I arrive at a new campsite.
Versatility: They're not limited to leveling alone. I've also used them to support my RV's stabilizer jacks, making them versatile tools for various aspects of RV setup.
Quality Build: These blocks are built to last. They can withstand the rigors of outdoor use and are resistant to UV damage. I'm confident that they'll serve me well for many RVing adventures to come.
In summary, the Camco Fasten XL 2x2 Leveling Block is an absolute must-have for RVers. They make leveling and stabilizing an RV a breeze and offer peace of mind in any terrain. These blocks have significantly improved my camping experience, and I highly recommend them to fellow RV enthusiasts.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 7, 2023
★★★★★ 5
Excellent set of leveling blocks
Size: 8.5" x 8.5", Color: Yellow
These leveling blocks work very well for our Airstream interstate 19. They pack very compactly and seem to stay in place when we are upon them. I would recommend they be purchased if you need a set of leveling box
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
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