Seems like some serious tech. It looks to be using GPS and some wireless signals to determine distance and direction? Im guessing GPS because their user manual

Seems like some serious tech. It looks to be using GPS and some wireless signals to determine distance and direction? Im guessing GPS because their user manual says it can only be used outdoors. I wonder if it can be miniaturized in future versions- seems like you could eliminate GPS if you used a synthetic aperture bluetooth or wireless receiver to determine direction and ranging for tracking.