Fashion Boys Girls Waterproof Sport Watch Dual Display Black Japanese High quality movement. Long Battery Life. Product Length:260mm, weight: 50g, Case size: 43 * 43 mm. thickness : 15mm. 3ATM water resistant (waterproof 30M). 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. Functions: Calendar, Stopwatch, Two time zones, luminated, Alarm clock.