Hello, this watch is an automatic mechanical watch. The automatic mechanical watch relies on the rotation of the balance wheel to wind the watch, and the rotation of the balance wheel relies on the swing of the wrist. Therefore, users must wear the watch for 8 hours or more every day and have a certain amount of wrist activity to provide sufficient power for the watch. The power reserve of this watch is 48 hours, that is, the watch can run for 48 hours after sufficient power is added to the watch. If you do not wear it for enough time a day and the kinetic energy is insufficient, you can manually wind it for about 20 turns. A watch can replenish power. It is recommended to wear a watch every day to replenish power.