LED light (super -illuminator) Auto illuminated button, selectable brightness duration (1.5 seconds or 3 seconds), phosphorescence World time 31 time zones (48 cities + coordinated universal time), daylight saving on / off 1/100 second chronometer Measuring capacity: 23: 5959.99-InchMeasuring modes: elapsed time, time division, 1st and 2nd place times Timer Unit of measurement: 1 second Count range: 60 minutes Count start adjustment range: 1 to 60 minutes (1 minute increments) 5 daily alarms (1 alarm with snooze function) Hourly signaling Complete automatic calendar (up to the year 2099) 12/24 hour formats Activating and deactivating button operation tone Indication of regular hours Analog: 3 hands (hour, minute (hand moves every 10 seconds), second) Digital: hour, minute, second, pm, month, date, day Accuracy:± 15 seconds per month Duration approx. battery life: 2 years with SR927W × 2 Size of the box: 59.1 × 52.4 × 16.1mm Total weight: 100g