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Note (not very important): 1. Friend, after a long transport time, a battery may fully discharge and may not turn on. Don't always, that's normal. Insert the watch in the correct position and recharge for 1 hour before use (even if the charging status doesn't stop anymore, the watch will turn on and show the charging status after a while). 2. Sometimes the clock is turned off. You need to hold down a touch area for a while (about 3 to 5 seconds) to turn on.