Beware of cheap no-name bands! in these circumstances, the ring is made of another material, so that it can come in the battery short circuits. In addition, I had a copy, where the recess for the button was not accurately, whereby the button is always jammed.
The original Joyetech these problems there.
However, I would have found it more beautiful when the brand name was not printed on the tape. Neutral black is simply discrete. Therefore a star deduction.