Made in Taiwan High Quality Entry-level watch winder Entry- Level watch winder. 2. Easy to operate. 3 Patented Light Sensor. 4. Patented stacking up to 3 lines and 4 horizontal. Mechanism: Panted Light Sensor controls the accuracy of TPD (Turns Per Day) Patented stacking up to 3 lines and 4 horizontal. Includes 2 spare belts. With Deep Dome cover accommodates the big dial watch. BOXY Brick winding system Without Adapter Add up Package. Include 2 spare belts so that the users could replace the belt easily when the driving-belt was broken. With Deep Dome cover accommodates the big dial watch. The power-sharing patented design allows automatic watch collectors to continue expanding their collections, and maintain the operation of the treasured watches in optimal conditions. This model is the Add-On system which don’t comes with the AC Adapter. You will need at least 1 FULL system (one power cord adapter including) if you plan on purchasing the units separately. As each unit is stacked on top of the other, the electrical current flows through them using a connectivity system. By combining the base stations you can also fill entire cabinets, display cases or safes – and even expand them at a later date. A maximum of 12 watch winders can be operated simultaneously by a Power Extension Tray and an adapter (medium base up to 6 watch winders). No additional connection cables are needed and every unit can be individually programmed. For stability we do recommend stacking only three winders vertically, and while using the Power Extension Tray. The Power Extension Tray is sold separately and provides an electrical current connection that allows an expandable watch winder system to be built both vertically and horizontally. Please keep in mind that this winder will not work on a Seiko Kinetic watch. We offer a full 1 year warranty for this product so you can rest assured that your purchase is protected against defects.