Classic Style For Men, Synthetic Sapphire crystal ,Screw-Down Crown ,With Hacking Function,Unidirectional Rotatable Bezel 25 Jewels Automatic Self Wind Movement Designed for accuracy,and longevity,with date function,With Hacking Function Synthetic Sapphire crystal and solid stainless case/band(Removable link Bracelet),Luminous hands and figure (need to absorb light energy storage),Case Diameter: 40MM, total length is 235MM, Function : Luminous ,Week,Month,Date,24 Hours,Waterproof.(200M/20ATM,swimming and diving,) is suitable for various occasions