Electro-luminescent backlightAuto light switch, afterglow Flash alert (LED indicator)Flashes with buzzer that sounds for alarms, hourly time signal, countdown timer time up alarm, countdown timer progress beeper, and stopwatch auto start World time28 time zones (48 cities); city code display; daylight saving on/off; 3 cities per screen 1/1000-second stopwatchMeasuring capacity: Lap time (5959.999); Split time (9:5959.999)Measuring modes: Elapsed time, Lap /split timesMemoly capacity: Two elapsed time records, each with 100 entries (1 elapsed time entry, 99 lap /split time entries)Recorded data: Elapsed time, lap/split times, lap/split numbers, best lap time and number, measurement start month, day, timeOther: Auto-Start (pre-countdown for five seconds and automatic start of a stopwatch elapsed time operation) 2 countdown timers (help you alternate between hand and easy pace for interval training.)Measuring unit: 1 secondInput range: 1 second to 99 hours, 59 minutes, 59 seconds (1-second, 1-minute and 1-hour increments)Other: Auto Repeat timing (Timer-to-timer, 5 repeats) 5 multi-function* alarms5 independent multi-function* alarms (4 one-time alarms and 1 snooze alarm)*Four patterns (daily, once, weekend, weekday) Hourly time signal*Start and stop time specification. Three patterns (daily, weekend, weekday) Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minutes, seconds, am/pm, year, month, date, dayOthers: Dual Time (can be assigned one of 48 city codes); week number; Dual Time Daylight Saving Time (summer time)/Standard Time; number of days elapsed since January 1; number of days remaining until December 31 Accuracy:±15 seconds per month Approx. battery life: 5 years on CR2025 Size of case : 52.3×45.9×14.6mm Total weight : 58g