Item Type: Watch shaker Material: Microfiber skin, aluminum alloy Size: Approx. 16.5 x 13 x 11cm / 6.5 x 5.12 x 4.33in Powered By Electricity: for USB plug in use. \Weight: 1191g / 42 oz(approx.) Package List 1 x Watch Shaker 1 x English Manual 1 x Cloth 1 x USB Cable Do not use plugs larger than 5V. 1AUTOMATIC OPERATION: Watch winder has an automatic function that winds watches without any manual operation, which is convenient for you to use. 2EXTENDS WATCH LIFESPAN: Mechanical watch winder helps to maintain the proper functioning of your watch and prevent it from stopping, thereby extending its lifespan. 3COMPATIBLE WITH ALL BRANDS: Automatic watches winder is compatible with all mechanical watch brands, including both automatic and manual watches. 4EASY TO USE: Shaker box is easy to use, simply place your watch inside and press a button to automatically wind it, keeping your watches safe and tidy. 5MICROFIBER SKIN: Constructed with microfiber skin, aluminum alloy materials with advanced technology, durable and built to last for years and long time.