Mineral Glass Shock Resistant 200-meter water resistance Case / bezel material: Resin Resin Band Electro-luminescent backlight Selectable illumination duration (1.5 seconds or 3 seconds), afterglow Flash alert Flashes with buzzer that sounds for alarms, hourly time signal, countdown timer,progress beeper, and stopwatch auto start World time 29 time zones (48 cities), daylight saving on/off 1/100-second stopwatch Measuring capacity: Measuring modes: Elapsed time, split time, 1st-2nd place times Other: 5-second countdown auto start Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-minute incrementsand 1-hour increments) Other: Auto-repeat, progress beeper 3 multi-function alarms (with 1 snooze alarm) Hourly time signal Full auto-calendar (to year hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: 15 seconds per month Approx. battery life: 5 years on CR2016 Size of case:mm Total weight: 48 g EL:Blue Green