Electro-luminescent backlightAfterglow Flash alertFlashes with buzzer that sounds for alarms, hourly time signals 1/100-second stopwatchMeasuring capacity:000000~595999 (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 2099) 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 : 53.2 × 50 × 16.3 mm Total weight : 74 g