I've just got the Info that the ST16 of the PRo Version will have three antennas and with that a video range of about 1.5 km (4500 feet). The ST16s of the current Adv. Version will be upgraded by Yuneec with the third antenna. This is just a first info, ive got from someone who is in contact with Yuneec. If i have further Infos about it and about the start date of upgrading, i will post it. Further with the next FW the connection time to cam shall be within 1:30 mins (eu version).