A compact and sleek watch winder for keeping automatic watches charged. The Mainspring Portero Single-Slot Black Watch Winder offers a reliable solution for your timepiece. It features customizable rotation modes including clockwise, counterclockwise, and bi-directional settings, catering to various watch movements. The ultra-quiet motor ensures a peaceful environment, making it suitable for bedrooms or offices. This winder boasts a sophisticated black finish and a minimalist design, fitting perfectly with any watch collection or decor. It is built with premium materials for long-lasting performance and offers versatile power options, running on either an AC adapter (included) or 2x AA batteries (not included). The secure watch cushion ensures a snug fit while protecting your watch from scratches. The dimensions are approximately 10.5 x 17.5 x 10.5cm and it weighs 760g. It can fit watches up to 55mm in diameter and includes a see-through cover.