1.need to match the remote control (optional parts).
2.FCC standard, the use of remote control in the open environment without interference, measured.
3.when using this function, it is recommended to cooperate with the blade protection cover.
4.the use of the battery in a calm environment, at 20 kilometers per hour uniform speed flight measured, the actual use of time or because of the environment and flight patterns vary.
5.about to match, need to use remote control.