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Go metal-clad in all black with a G-SHOCK that says strong, steely, and stylish. The metal bezel, finished in black ion plating, makes a chic, stylish statement about your design sense. Opt for the GM-2100 with the popular octagonal bezel or the GM-110 with its oversized round case. Either way, you get an all-black fashion statement with a luxury feel and versatile cool look. Ready to go wherever you want to go.Case size (L× W× H): 51.9 × 48.8 × 16.9 mmWeight: 93 gCase / bezel material: Resin / Stainless steelResin BandShock ResistantMagnetic Resistant200-meter water resistanceApprox. battery life: 3 years on SR927W X 2Mineral GlassBlack ion plated bezelCompatible band size 145 to 215 mmNeobriteWorld time31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping1/100-second stopwatchMeasuring capacity: 999:59'59.99''Measuring modes: Elapsed time, split time, 1st-2nd place timesCountdown timerMeasuring unit: 1 secondInput range: 1 minute to 24 hours (1-minute increments and 1-hour increments)5 daily alarms (with 1 snooze alarm)Hourly time signalLED light (Super Illuminator)Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglowLED: WhiteFull auto-calendar (to year 2099)Button operation tone on/offAccuracy: ±15 seconds per month12/24-hour formatRegular timekeeping:Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (stopwatch indicator)Digital: Hour, minute, second, pm, month, date, day