Dual back pusher powers, forward and backward propellers cancel each other out, course lock is more stable. The built-in six-axis gyroscope flight self-stabilization system, allow the beginner to master it easily. Remote control transmitter comes with small rudder and big rudder control. Small rudder for beginners, big rudder allow the stunt function of airplane, like rotating etc. USB charging, can be charged 2 groups batteries at the same time.