Reset
1. Put both earphones in the box and close the cover, then take any earphone
and long-press the touch area for 10s. When you hear the power-off tone, put
it back in the box.
2. Repeat the above steps. Take out another earphone, long-press it for 10s
and close the cover.
3. Finally, take out two headphones from the box. The two headphones have
been paired again.
