The Cub Winders are a user-friendly, travel-ready winder. The Module 1.8 is pre-programmed at 900 turns per day rotating bi-directionally. Additionally, these winders can be stored in custom cubbies and can be stacked to create a larger modular unit. Dimensions: 5″w x 4.5″d x 5.75″h. Works on either 3v ac power adapter (included) or d-cell battery. Black faux leather exterior and gray dobby twill interior. Large, lock-in cuff to accommodate larger, heavier watches.