教程
SETTING THE STRAPS BEHIND THE EARS WEARING THE STRAPS BEHIND THE EARS SETTING THE STRAPS WITH THE LARGE CLASP WEARING THE STRAPS WITH THE LARGE CLASP SETTING THE STRAPS WITH THE SMALL CLASP WEARING THE STRAPS WITH THE SMALL CLASP SETTING THE STRAPS BEHIND THE HEAD WEARING THE STRAPS BEHIND THE HEAD REMOVING AND REPLACING THE FILTER RE-CHARGING WITH THE USB CABLE