1, first of all, you can use your fingers to break the ear bone clip.
2, stuck on the ear, after the card to adjust the tightness.
Note:
1, if it is too loose, we may run and walk again, or some big movements will fall, then if it is too tight, it will affect the blood circulation of the ear.
2, if worn for a long time, it may also affect the nervous system, so be sure to pay attention to the wearing time.