I own two of these and one has some slightly annoying high pitched whining that is noticeable at low volumes, the other does not have this problem

Got blasted white noise into my ear for a moment and some high pitched whine that hurt like hell

It always had a high pitched whine to it in the background (which was a bit annoying on low volume)

It is not a high pitched whine, just a low background hummmm that I notice.**On a developers' note, would be very nice if there can be a beacon sound one can activate on the charging dock to locate the bud

Amazing I love it, great to work out, battery life is

n’t work out

Amazing I love it, great to work out, battery life is

In less than a week, I’ve been contacted 2 to 3 times by e-mail with an apology, a plea for a second chance and to see if I have received my product