This Volta double (2) watch winder features a high gloss carbon fiber finish with an ultra-soft gray microfiber suede interior and is part of the Roadster Collection. The inside portion of this winder is lit by 4 white LED lights that beautifully showcases the watch that is mounted onto the winder. The winder sits on a ball bearing base that allows the winder to rotate 360 degrees with ease. This winder can be locked using the supplied key to ensure the safety of your prized possessions. Each of the watch mounts is powered by its own high quality and ultra-quiet Japanese Mabuchi motor with a beltless construction which will allow you to use your winder for many years. The winder is powered by a supplied 110/240v adapter. To control the motors of the winder, you will find an LCD screen on the inside of the winder. Using the buttons to the right of the screen, you can control the revolution direction and the speed (TPD) of the winder. You are able to select a clockwise setting, a counterclockwise setting, or a combination of clockwise and counterclockwise revolutions. With this Volta winder, you are able to select a speed (TPD) setting of 650, 900, 1350, or 1800 revolutions, so you will definitely be able to find the right setting for your specific watch. This Volta winder features speed winding and sleep mode options. The speed winding options is available for those instances when your watch has completely died and you need to repower it. The sleep mode option allows you to mimic normal day to day wear as the winder will not work for a period of up to 16 hours per day. Each winder has its own serial number and can be registered online at www.voltawinders.com.