This is a standard model that packs G-SHOCK level toughness with a stopwatch, countdown timer, EL backlight, and more. Basic Information Case size (L× W× H) 48.5 × 43 × 14.7 mm Weight 59 g Case and bezel material Resin Band Leather/Cloth Bands Construction Shock Resistant Water resistance 200-meter water resistance Power supply and battery life Approx. battery life: 2 years on CR2016 Exterior Glass Mineral Glass Watch Features Stopwatch 1/100-second stopwatchMeasuring 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 second (for the first 60 minutes)1 second (after 60 minutes)Measuring modes: Elapsed time, split time, 1st-2nd place times Timer Countdown timerMeasuring unit: 1 secondCountdown range: 24 hoursCountdown start time setting range: 1 minute to 24 hours (1-second increments, 1-minute increments and 1-hour increments)Other: Auto-repeat Alarm/hourly time signal Hourly time signal Multi-function alarm Flash alert feature Flash alertFlashes with buzzer that sounds for alarms, hourly time signals, countdown timer time up alarm Light Electro-luminescent backlight Afterglow Light color EL:Blue Green Calendar Full auto-calendar (to year 2099) Accuracy Accuracy: ±15 seconds per month Other features 12/24-hour format Regular timekeeping: Hour, minute, second, pm, month, date, day