This is a mechanical watch, hand wind up (no batteries required). How to use mechanical watch? 1. When you wear it for the first time, please wind it up by turning the button on the side of the watch. 2. Gently remove the button to adjust the time, and press the button back. 3. If it doesn't move for a long time, please shake it lightly for a few minutes and wind it up several times. At this time, it will work normally. 4. If you still have any questions, please contact us first. TIPS AND TIPS: Fully winded, this watch has a power reserve for up to 36 hours. If you wear it more than 10 hours a day, no extra wrap is required.
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