Electro-luminescent backlightAfterglow Flash alertFlashes with buzzer that sounds for alarms, hourly time signals 1/100-second stopwatchMeasuring capacity: 0000"00~5959"99 (for the first 60 minutes)1:0000~23:5959 (after 60 minutes)Measuring unit: 1/100 second (for the first 60 minutes)1 second (after 60 minutes)Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timerMeasuring unit: 1 secondCountdown range: 24 hoursCountdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)Other: Auto-repeat Multi-function alarm Hourly time signal Full auto-calendar (to year 2039) 12/24-hour format Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: ±15 seconds per month Approx. battery life: 2 years on CR2016 Size of case : 48.9×45.4×13.4mm Total weight : 53g