Chrome Plated Resin CaseCasio Golden Tone Stainless Steel Case and BraceletMeasuring unit: 1/10second1/100 second digital stopwatchMeasuring capacity: 59'59.99"Measuring modes: Net timeDigital:Hour minutes sec date dayWater ResistantCountdown timerDaily alarmHourly timesignalAuto-calendarAccuracy: +/- 30 Seconds per MonthApproximate Battery Life: 2 Years onSR1116WModule : 526Case diameter : 24.5 x 7.5 mm (thickness)Weight : 36g