G-Shock Black Military GA100MB-1A Watch. G-Shock’s most popular large case analog/digital series introduces a matte black watch, the GA100MB-1A. The face and band are matte black with green accents which highlight the toughness and coolness of G-Shock. Features include: Case size (L× W× H): 55 × 51.2 × 16.9 mm Weight: 72g Case and bezel material: Resin Resin Band Magnetic Resistant Shock Resistant Water resistance 200-meter water resistance Approx. battery life: 2 years on CR1220 World time World time 29 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping. Stopwatch 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). Timer 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. Alarm/hourly time signal 5 daily alarms (with 1 snooze alarm) Hourly time signal. Light LED light Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow Light color: Amber Calendar Full auto-calendar (to year 2099) Other features 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 This watch comes with G-Shock authenticity certificate.