G-Shock GA100GBX-1A9ER. From G-SHOCK, the watch brand that is constantly setting new standards for timekeeping toughness, come new additions to the standard model lineup. The popular DW-9052, big case GA-100, and combination AW-591 start out with basic G-SHOCK black, which is then accented with brilliant rose gold and gold accents. The new gold-accented designs are really attractive additions to the G-SHOCK lineup. Features include: Case / bezel material: Resin Resin Band Magnetic Resistant Shock Resistant Mineral Glass 200-meter water resistance LED light Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow World time 29 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city / World time city swapping 1/1000-second stopwatch Measuring capacity: 99:59'59.999'' Measuring modes: Elapsed time, lap time, split time Others: Speed (0 to 1998 units / hour), Distance input (0.0 to 99.9) Mach indicator (speed exceeding 1225 units / hour) Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments) Other: Auto-repeat 5 daily alarms (with 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Regular timekeeping Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (speed) Digital: Hour, minute, second, pm, month, date, day Accuracy: ±15 seconds per month Approx. battery life: 2 years on CR1220 This watch comes with a G-shock authenticity certificate.