I'm not so sure about the range but the signal is terrible. I've been in the middle of the ocean and losing signal 2-300 metres away and it says weak connection returning home. 3 times on the same perfect day ; ( Such a waste of battery power and missing the surfing action I was trying to video. Such a shame because the image quality is good, but that signal a constant problem. I'm going to invest more money in upgrading the signal with an external antenna but seriously gopro failed here, with all the pre-manufacture testing done I would think they would admit the fail and go with external antenna's for a stronger less problematic signal.
Please find a link for this external antenna, , looks mighty powerful so should turn this piece of crap into a sweet machine, though as noted above this should have been gopro getting a fundamental operational requirement sorted, and not me their customer through a third party vendor , another $109.00 and then have the issue of voiding my warranty by making this modification to correct gopro's fail with the signal issue.
DRONE RANGE EXTENDER | Florida 33178 USA | ITELITE ANTENNAS Inc.