【Friendly for Kids and Beginners】: Optical flow positioning allows the bottom camera to accurately capture the ground or any object, keeping the drone in a hovering state. 【Automatic Obstacle Avoidance Mode】: Three-way automatic obstacle avoidance function, when turned on, it has the ability to perceive the front, left and right directions. It can perceive the distance of obstacles and avoid them in advance. When turn on it, the speed of the drone will become slower and the fast speed mode will turn off temporary.So recommended to fly indoors when using this mode. 【Note】: Before each use need calibrated, pushing the left stick up and down to link drone and then push both sticks to bottom right. Beginners are advised to use it indoors before outdoors. When in outdoor, please go to an open.