it looks good and fits well on the wrist, it's heavy but not too heavy. The "smart" thing monitors your activity (sleep, walking, etc.) and for this purpose you need to install an application. the vibration function isn't great (I can hardly feel it unless the configuration is set to maximum, which will decrease battery life). to identify them, and since you need to be close to your phone to connect, it doesn't make much sense. The same happens with some apps like WhatsApp where the watch only notifies you when you receive a message but doesn't know who is sending it. Again, this is useless as you can just hear the tones you assign to each contact instead of seeing your watch. My advice, buy them if you like the looks but not for the "smart" thing. To update. a year later I change the battery and the lid clogs so badly that I really don't know if I can open it again in the future.
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