When I unpacked the watch, I pushed the main button on the front, assuming something would turn on. There are no other buttons. Tried charging for 10 hours. The charge indicator never changed color from orange to green. Some other reviewers have written about being able to at least see a screen that says the battery is low. I couldn't turn it on at all. I figured if I spent a little more money on a pulse oximeter, I'd at least get a device that turned on. What a waste.
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