A watch winder is a device that keeps an automatic watch running automatically. Normally, the watch is always in motion due to your arm movement. However, perhaps you own another valuable watch or watches and only wear them on special occasions. So that these watches do not move when "resting", they are moved by the watch winder - the movement of the arm is simulated. The watches can be worn immediately at any time and nothing has to be set. You can connect the watch winder to a cable or operate it with 2 x 1.5 volt batteries (not included).
Caution: Inside the safe, the watch winder may only be operated with a battery!