◆Two power supplys modes: Mains power supplys and batteries power supplys cannot be used at the same time. The batteries are two AA batteries. ◆Lightweight: The watch box is light and sturdy, easy to transport, and provides a safe storage solution for your watch. It can also be used as a display box. ◆Glass cover: The watch box has a glass cover as an observation window, through which you can see the watch when it turns. ◆Silent rotation: The automatic watch winder is by an ultra-quiet motor, which can gently and safe rotate your watch. ◆Long batteries life: The watch winder has a long batteries life, which can last for about a month.