A part of the review has been auto-translated.
https://youtu.be/H3oo3vHEDT8
This little guy is slightly bigger than a 20x20 fc. You have to power it with 5v and it's super easy to do. You can use the 5vbec on any standard esc. For opto esc a separate bec will be required. I wired in a mamba 5v/9v bec because it's small, and I kept it in line with the esc so it's neat. I soldered a xt60 with a cap. The only miss I could find other than no documentation was the 5v power! You'd think they would have it so you can power direct voltage. I haven't used it yet but plan on putting this in something soon. In the picture you will see how I wired in my 5vbec and connected it to the board. If your trying to figure out the Batt/ Esc situation, it looks like that is kept separate from the rest of the board. Almost like a pdb but only dealing with the battery and esc that's it. Thanks BG for the fast delivery!!