LED lightAuto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow World time31 time zones (48 cities + coordinated universal time), one-touch UTC time zone, daylight saving on/off, Home city/World time city swapping 1/100-second stopwatchMeasuring capacity: 23:5959.99-InchMeasuring modes: Elapsed time, split time Countdown timerMeasuring unit: 1 secondCountdown range: 60 minutesCountdown start time setting range: 1 minute to 60 minutes (1-minute increments)Other: Auto switching to elapsed time measurement (up to 60 minutes, 1-second units) when the end of a countdown timer operation is reached 5 daily alarms (with 1 snooze alarm) Hourly time signal Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.) Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeepingAnalog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (countdown timer minutes)Digital: Hour, minute, second, pm, month, date, day Accuracy:±15 seconds per month Approx. battery life: 3 years on SR927W × 2 Size of case : 55 × 51.9 × 18.3mm Total weight : 70g