BaghdadCafe

What you're asking is more about how DJI designed their app to work. What this app version does is simply ensure that it always sets the standard FCC power rating allowed by FCC (US and some other countries), which is higher than the CE rating you get by default when you start the app in a CE rated country. According to DJI's own specs this difference is: Transmitter Power (EIRP) FCC：≤26 dBm CE：≤20 dBmhttp://www.dji.com/mavic/info#specs If there is any difference for other models (P4, Inspire, etc) then you should be able to find it on the appropriate DJI pages for those other models.