They were functional for precisely one year before the built-in bluetooth in each of them ceased operating properly, at which point they turned into stone. When the clock is turned on, it does not activate; conversely, when the clock is turned off, it does. But, anyway, I went ahead and purchased them new ones because there is nothing else on the market that can compare to it in terms of price and functionality. In the future, I would advise you not to check the protection against falls as much as you check the protection against moisture (I used them to take a shower every day for an entire year), and I would advise you not to check the moisture protection too much.
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