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Arrived fast and in good conditions. I've been using it for more than 1 week now. First battery charge went to 73%, it lasted more than 1 week before it wore off. Working fine, it does what it is announced, using it mainly to monitor sleep pattern and monitor daily activity (heart beat, steps, distance). Didn't try it under water but already received spashs of water and it was no big deal. Totally recommend it, excellent purchase for the cost.
Works like it should. Once you are connected to your phone and app (gloryfit) the time will synchronize. There are a many options in the app to make it your daily helpful gadget. The display is big enough and clear. Charging power should be minimum 5v-1a, if it's less it doesn't load correctly. Batterytime should be around 7 days if you don't overuse it. For the price it was a good buy and came in 3 days 👍🏻