waiting for an email response
Will update when I receive email from the seller.  I have the JH-A17 mini version and I have an issue adjusting the volume on both left and right.  I have pressed the button as instructed, several times and heard the three beeps stating "reached max volume" and pressed once more to what I feel to be the lowest volume and still squelching in both the left and right ears.
Rating: 3 stars