SpeedyBee F4 Flight Controller Stack:30x30 Bluetooth Stack with 4in1 50A ESC,Wireless Betaflight Configuration,Blackbox,Barometer for DJI Air Unit FPV Drone Fixed-wing X8 (FC ESC Stack)

It worked great for my build xilo stealth 2600kv it connected to the app easy nice product held up great easy betaflight program.

I've had this speedybee f405 flight controller for 5 months now, and have ran well over 100 packs on it. It's held up really well. I've seen alot of negatives in Facebook groups and in reviews about speedybee and their flight controllers. I haven't had any issues whatsoever. I've had some pretty serious crashes and what not with it. Still holding up great. A few tips I would give to newbies purchasing this stack, would be to (1) take your time soldering, (2) cover all the areas you wish not to solder up painters tape or something similar to prevent solder from splattering the board. (3) and put a preset tune in like supafly if your doing freestyle when your setting up your quad. I ran for months with default tune settings, and I downloaded a preset in it, and what a world of difference it made to my flight time and flying in general.

Best I think I'm going to buy a backup one just because

I really like the features and design of this stack. It seems very well thought out, nicely manufactured and packaged. Sad to say this product did not work for me twice in a row. First unit had a defective ESC that was shorted. Second unit had a defective gyro that was not able to be recognized by the firmware. In both cases a lot of time and trouble was required to figure this out, so I opted to move on to a different stack. As a 30+ year electronics industry professional I am well aware of what to do and not do and recognize that user error is the most common cause of failure with this type of stuff. I do not believe this to be the case with my experience.

The stack is great but i do not know why if i have prime, it shipped with usps, and it never showed up.Luckily amazon provided me with a refund.Will buy again

Solid performer with all the Uarts you need. Easy to tune. I think I tuned this stack in one pack.I have 1750kv motors on 6s, the ESC handles 5046-5052 props with the motors only getting slightly warm after hard flights. It's priced right for the performance.

Nice unit, but for my build I would like the battery pads to be extended out the back a little.

Thing flies great I’ve had 3 quads and bought this to replace a xilo f4. This board gives a smoother flight and way cheaper.