The electronic geo fence is maximized to 100 meter in the app, and the transmitting frequens is wi-fi so somewhere around 100 meters before you lost contact and the breeze will return home again.
What about smartphones that can control this drone.....what type of WiFi (802.11 a/b/g/n/ac 2.4 / 5 GHz) must be integrated into smartphone to be sure that supports controlling this drone.