I wish they were all the same size. It was so close to my Fitbit but not wide enough. I think Fitbit, like many other companies, changes their product in such a way that none of the parts can be replaced in the event of a failure. Then only a new purchase helps. It stated which version of Fitbit it was for, but Fitbit itself has nothing to determine which version it is. He could easily have added this so spare parts could be found.
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