Features LED illumination and Auto light switch. Case / bezel material: Resin / Aluminum Resin Band Mineral Glass Shock Resistant 200-meter water resistanc Size of case : 55.1x52.5x16.3mm Total weight : 69g Specifications LED Backlight (Super Illuminator) Countdown timer Auto light switch, selectable illumination duration, afterglow. Measuring unit: 1/10 second Flash alert Countdown range: 24 hours Flashes with buzzer that sounds for alarms, countdown timer (time up), hourly time signal Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments) Multi Time (4 different cities) 5 daily or one-time alarms World time Hourly time signal 31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping Full auto-calendar (to year 2099) 1/100-second stopwatch 12/24-hour format Measuring capacity: 23:59'59.99'' Button operation tone on/off Measuring modes: Elapsed time, split time, 1st-2nd place times Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: ±15 seconds per month Approx. battery life: 3 years on CR2016 
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