ZLL SG901 MAX with Brushless motor, electric adjustment camera, rise and fall, left and right turn, forward, backward, left and right side flight, fast and slow speed control, headless mode, optical flow fixed height point, dual camera switch, UAV comes with GPS positioning function, can achieve: one key return, low power and out of control automatic return powerful function, dual camera with optical flow fixed height mode and four sides obstacle avoidance function.