Enter the world of Orbita Watch Winders with this Sparta double Watch Winder shown in BOLD BLACK. Sparta winders are compact and lightweight, perfect for any mechanical watch. Orbita Sparta 2 winders are available in BOLD COLORS: Black, Blue Brown, Green, Red and White. This winder is ideal for use in a safe, vault or display case without the need of a plug-in adapter. The Sparta 2 utilizes Orbitas "made-in-the-USA" patented Rotorwind Movement, unique in that it swings, oscilates, an automatic watch, rather than rotating it. This specific movement mimics the natural swinging action of the wrist. With a series of oscillations triggered by a single revolution of a low current draw-drive motor, power is needed only for either a 10 minute cycle with an estimated 900-950 Turns-Per-Day (TPD) or a 15 minute cycle with an estimated 750 TPD. Battery service life can be measured in terms of years not months. Operates on Lithium D-Cell Batteries. Batteries are long lasting up to 5 years. The 10 minute or 15 Minute Cycles are easily selected using the toggle switch located behind the mounting cup. Comes Complete with a 2 year **for any defects in materials and/or workmanship. An extended **is available for purchase through Orbita.