DJI ALV 5.8 Ghz video transmitter (feeds video from GoPro to video googles in real time)
DJI iOSD Mini gives you "heads up display" of aircraft characteristics - altitude, distance, GPS lock, battery strength, etc. http://bit.ly/1qkiRnD
The quad copter remained under 400 feet as per FAA Advisory Circular 91-57 for remote controlled airplanes and helicopters and the helicopter did not encroach into any airport no-fly zones. No people were present and no equipment was operating at the construction site at the time of filming.