1/1000-second stopwatchMeasuring capacity:00'00''000~59'59''999 (for the first 60 minutes)1:00'00''0~23:59'59''9 (after 60 minutes)Measuring unit:1/1000 second (for the first 60 minutes)1/10 second (after 60 minutes)Measuring modes: Elapsed time, lap time 39 time zones* (39 cities coordinated universal time), daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping*May be updated when connected to a smartphone.