Military Cool Colorful Light Digital Sport Water-Proof Stealth Fighter Style Wrist Watch -Blue Japanese High quality movement. Long Battery Life. Come with date display, colorful light functions. Date, Week Display. Alarm Function. 5ATM water resistant (waterproof 50M). Please don't press button under water. Material: high-quality titanium case ( not fade & not allergic ). Case cover: thick hardened mirror glass, German glass high hardness , wear resistance , compressive strength, heat resistance with imported glue, waterproof effects special good. Case back: stainless steel, stainless steel buckle. Strap: German BASF original silicone strap , plus feel the spray oil, soft and comfortable, anti-static dust. Length: Approx 9.92inband Width: Approx 0.87in ,Case Diameter: Approx 1.88X1.61inCase Thickness: Approx 0.39inSuitable for wrist(perimeter): 7.16in to 8.93in