[SirMaster]

Hmm, 2.5km?

I've flown the original DJI Mavic Pro to about 4-5km multiple times and never had any real issue with the video feed.

I'd be surprised if this much newer gen is worse.

[Foivos]

Which country was that? The drone detects the country through GPS upon startup and limits its transmission power according to the local laws.

In the US, the drone can use way higher transmission power (~ 4-20 times more, depending on the drone) .

[SirMaster]

I've done it in the US and Brazil and the Carribbean.

[Foivos]

US and Brazil follow the FCC rules. I would guess most of the Carribbean would follow FCC as well.