A watch winder is a device designed to keep automatic watches wound when they are not being worn. These watches rely on movement to wind their mainspring, which powers the watch. If left unworn for an extended period, they can stop functioning, requiring manual winding or resetting the time. Watch winders come in various styles and sizes, accommodating one or multiple watches. They simulate the motion of a wrist, ensuring that the watch remains ready to wear at any time. This is particularly useful for collectors or those who own high-end timepieces, as it helps maintain the watch's accuracy and longevity.