Extras
USB GPS Flight Recorder for autonomous flights, This alone costs $150 - with this you show AR Drone on map where it has to go
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A:

I have a DJI Phantom 3 Standard and I have a GPS module that I bought from eBay. I have not used it yet, but I am planning to use it for my next flight.
I have not used the GPS module yet, but I have used the GPS module