A watch winder is a device designed to keep automatic watches wound when they are not being worn. Automatic watches rely on the movement of the wearer's wrist to wind the mainspring, which powers the watch. When left stationary for extended periods, these watches can stop running, requiring manual winding or resetting. Watch winders come in various styles and sizes, accommodating one or multiple watches. They simulate the motion of a wrist by rotating the watch in specific patterns, ensuring that the lubricants inside the movement remain evenly distributed. This helps maintain the watch's accuracy and longevity.