Right from Autel. " Andrew AR We have spent considerable time and engineering efforts to enhance and refine the automatic channel switching on the 2.4GHz frequency. Numerous range tests and a vigorous quality assurance process has been taken to ensure the signal is strong, reliable and can achieve the full range of 7KM in ideal conditions. The 900MHz frequency is used by Emergency Services in some European countries. This decision was made to help open up sales internationally for the future. We feel confident that this minor change will not affect the performance of EVO and will open the door for new pilots globally."