Mineral Glass Shock Resistant 200-meter water resistance Case / bezel material: Resin Resin Band LED backlight (Super Illuminator) Auto light switch, selectable illumination duration, afterglow Flash alert Flashes with buzzer that sounds for alarms, hourly time signal Multi Time (4 different cities) World time 31 time zones (48 cities coordinated universal time), city code display, daylight saving on/off, Home city/World time city swapping 1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timer Measuring unit: 1/10 second Countdown range: 24 hours Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments) 5 daily or one-time alarms Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping Digital: Hour, minute, second, pm, month, date, day Accuracy: ±15 seconds per month Approx. battery life: 7 years on CR2025 Size of case: 55 × 51.2 × 17.4 mm Total weight: 72 g LED:White