Specification: ● LED light Selectable illumination duration, afterglow ● Multi Time (4 different cities) ● World time 31 time zones (48 cities + coordinated universal time), 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 Input 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: Hour, minute, second, pm, month, date, day ● Accuracy: ±30 seconds per month ● Approx. battery life: 10 years on CR2025 ● Size of case : 45×42.1×12.5mm ● Total weight : 91g