This product is self-winding automatic mechanical wristwatch designed with metal band. Since it's automatic mechanical, it would get energy through your movement rather than battery. Generally speaking , the error of +-45 seconds per day is possible, so you don't worry. * Swing the watch 20-30 times, for the first use. * Put the watch on the horizontal state and swing the watch for couple minutes before you wear it. * Automatic mechanical watch requires the user wear everyday, do with the proper amount of movement enable the bar to keep running. * It is normal to become slow, if the user have less activity on it.
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