connectivity

I am curious if there are after market antennae or other boosters to increase the range of the Evo II enterprise from the smart controller. I have lost connection numerous times when the drone was about 2,000' away, still in line of site. I would like to have at lease a 1 mile range.

My Evo 1 continues to work flawlessly except for one specific issue that recently began, as follows: Cold start and controller connects to drone and no issue (takes flight). Use 3 batteries consecutively without turning off controller (about 75 min flight time). Turn off controller and install...