1. First, before wearing the helmet, be sure to measure the head circumference or try it on Electric vehicle helmet Determine the size of the helmet, and open the adjuster on the back of the helmet to the maximum when wearing it.

2. After adjusting the helmet, open the harness on the helmet and place the helmet horizontally on the head. Do not tilt forward or backward. Because the helmet inclines forward, the helmet cannot protect the forehead; The backward tilt will block the vision and cannot ensure the safety of the head backward position.

3. Tighten the adjuster and swing the head up and down until the helmet does not shake and it feels comfortable.

4. Then, adjust the degree of the black fork buckles on both sides of the helmet so that the ears are in the middle of the two belts.

5. Finally, adjust the length of the chin socket and fasten it, leaving a finger gap at the chin.