Installed this on my BetaFPV Pavo Pico O3 and it's been working great. I haven't sent it out to any real far distances, but I don't see the need to since this is such a tiny quad and it serves its purpose for what I use it for (cruising around the neighborhood).

I highly recommend this tiny antenna for small quads such as the Pavo Pico.

They perform the same but are way sturdier.
Plus: you can get different length and red ;-)