Men Automatic Green Face Watch (Waterproof) Three-dimensional scale, layered dial, classic tourbillon watches design, multi-function dial design, month/week/calendar window matching, stylish and practical.Automatic watch, no battery, imported mechanical movement,proper manual winding, can effectively reduce time deviation, energy reserve more than 45 hours. (Note: For the first use, please manually rotate the crown clockwise for 30-45 turns. Automatic winding men watch usually winds automatically by the shaking of the arm. If you do not wear it for a long time, you need to wind it manually when you use it again)