SpeedyBee F405 Mini Flight Controller Stack board 3-6S 20x20mm Built-in Bluetooth with 35A BLHeli_S 4in1 ESC Board Support Wireless Tuning

Not sure how they could’ve made this little system any better. I’ve had consistent success with this tiny stack on 4 builds now. Very reliable and best price on the market. Speedybee is the Shiznit!

This is my go-to stack. It's reliable, hardy and space saving. I've run it on heavier 5in quads too, just upped the cap to a 50v to help with any spikes that might happen on high throttle. But for my 3 and 4in this is what I reach for a new build.

I put this in my geprc baby croc 5" and paired with some 2105.5 2650kv hglrc specters and the thing rips. Didn't expect to get 100mph with a 1500mah 4s either..

This genuinely is a good product but I was sent a USED one… it had solder all over it and was messed up

This was my first drone build. This package kicks butt. Be sure to run the capacitor where they recommend it. Very straight forward. I have purchased a few.

This controller is great

I have 6 of them no problems so far.tryed some other products with no luck they fall apart the bees are good quality. I will be get more of the bees

I've heard so many good things about this so I gave it a try. For some odd reason the fc would not power at all via the ESC harness - only unless I plugged it in via USB. I repair drones/flight controllers as a side gig and have never had this happen. Hopefully the replacement will work ok.EDIT: Replacement worked, but was super fiddly and would either not power the fc properly or spin certain motors. I found it was due to the wiring harness. I don't know what's wrong with it, but it took a lot of unplugging and replugging the harness to get everything to work finally. It seems secure but I'm a little worried that one crash will cause problems again.