Optimal Mavic Air Controller Antennae Placement

What is the way to optimally position the antennas for the DJI Mavic Air?

DJI Mavic Air Review After Flying For More Than a Week

This is how to attach prop guards to the DJI Mavic Air.

DJI Mavic Air Prop Wash?

Several people have commented about lines within DJI Mavic Air videos.  Did I capture that within this video?  Is it a camera defect or due to sunlight, propellers and/or other factors?