Compared with the built-in type, the internal earphone is thinner and does not squeeze the ear. Large-capacity battery, which makes the standby time and working time of the whole machine longer. Fix the main unit with screws and bayonet: make the main unit installation tighter, and the high-speed ri..
Compared with the built-in type, the internal earphone is thinner and does not squeeze the ear. Large-capacity battery, which makes the standby time and working time of the whole machine longer. Fix the main unit with screws and bayonet: make the main unit installation tighter, and the high-speed ri..