DW B5600SF 7 SKU X000006756 Energy saving (hands stop to save Color:Gekristalliseerd Energy saving (hands stop to save energy when the watch is in the dark) Carbon Core Guard structure Basic Information:Case Dimensions (L × W × H): 48 4 mmWeight: 53 gCase and Outer Frame Material: ResinBand: Resin bandConstruction: Shock resistantWater Resistance: Water resistant up to 20 barPower Source and Battery Life: Estimated battery life of 3 years on CR2016Smartphone Link App Connectivity Features:Smartphone LinkMobile Link (wireless connection via Bluetooth®)Apps: CASIO WATCHESApp Connectivity Feature: Automatic time adjustment Easy watch settings Times for approximately 300 cities worldwide App information Time and Place reminder Phone finderExterior:Glass: Mineral glassCompatible Band Size: 145 to 205 mmFunctions:World Time: 38 time zones (38 cities + coordinated universal time) Display of city code and city name Daylight Saving Time (DST) on off Automatic DST switching Switching between city time and world timeStopwatch: 1 100 second stopwatch Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes) Measuring unit: 1 100 seconds (for the first 60 minutes)