Is the c version responsible for range increase to 3.1 miles or 5 km? Or is firmware, and or hardware also on air end? Thanks in advance

Disregard I found fcc documents answering my question

Where did you find FCC documentation comparing the A, B, C radios?

Dacon Productio Posted at 2016-2-21 20:32
Where did you find FCC documentation comparing the A, B, C radios?

Read this for more information: http://www.globe-flight.de/mediafiles//CE Dokumente/DJI Matrice/RC Sender.pdf