The bracelet is so great that my daughter wears it on the upper arm. Even on my wrist this bracelet slackens and the bubble function is only possible in the off-hook condition. Thus, the disappointment of my daughter was quite large. After 2 hours tinkering in the basement and a leather strap assembly could then use this bracelet. The return I have not chosen because the costs were at my expense (under 40 value of goods) The money would thus been away anyway.