39 time zones* (39 cities + coordinated universal time), city name display, daylight saving on/off, auto summer time (DST) switching *May be updated when connected to a smartphone. Stopwatch 1/1000-second stopwatch Measuring 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 Recorded data: Up to 200 records (measurement lap times) Other: Speed (0 to 400 units/hour) Timer Countdown timer Measuring unit: 1/10 second Countdown range: 24 hours Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)