With automatic mechanical winding very convenient, .The length of the strap can be adjusted according to the width of different hand bowls Strap detachable, 904L super austenitic stainless steel Optional with box, the box is equipped with a complete set of instructions, certificates, bills, etc., absolutely first-class The watches is AAA quality The strap and case are made of special steel, which can resist corrosion and oxidation, and keep the surface glossy for a long time..syi