professional 5g brushless rc drones with 4k hd camera gps electronic fence follow me wifi fpv remote control helicopter model

notice: ​the smartphonedonot be included main feature: gps intelligent positioning: optical flow module + gps module positioning system that allows indoor and outdoor have good hover flight performance beginner mode: built-in geo-fence for the novice, limit high limit distance flight, so that novices can safely ease of use intelligent control: a key take-off, landing a key, a key to return other functions, so the flight is no longer difficult secure flight: low return, lost to return, o...