Case or bezel material: resin, resin band, mineral glass, shock resistant, 200-meter water resistance, 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 or off, home city or world time city swapping, 1or100-second stopwatch, measuring capacity: 23:59'59.99'', measuring modes: elapsed time, split time, 1st-2nd place times, countdown timer, measuring unit: 1or10 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), 12or24-hour format, button operation tone on or off, regular timekeeping, digital: hour, minute, second, pm, month, date, day, accurately.Remove plastic at crown to start the watch