KS Grand Men's Elegant Self-Winding Mechanical Calender Leather Band Wrist Watch Present by Kronen & Shne group, GRAND series. Equipped with caliber KM02J05. Self-winding watches with automatic movements utilize kinetic energy, the swinging of your arm, to provide energy to an oscillating rotor to keep the watch ticking. If you do not wear an automatic watch consistently (for about 8 to 12 hours a day), you can keep the watch powered by using the watch winder, otherwise, the watch may stop working. Centre hour, minute and seconds hands. Day display at 9 o'clock. Date display at 3 o'clock. Month & year display on 12 o'clock. Case diameter: 45mm and thickness: 14mm. Leather Band Length: 190mm max, buckle included. ATTENTION!!! This is NOT a perpetual calendar watch. The month display function will NOT be changed automatically. You MUST adjust it monthly. In addtion, it does NOT make the leap year adjustment, and treats February as a 30-day month, so the date must be reset on March 1 every year when it incorrectly says February 29 or 30. Package Included: -1 x Genuine "Kronen & Shne" Watch. -1 x Wooden Box and -1 x International Guarantee Card.