World Time. World time with 31 time zones (48 cities + Coordinated Universal Time), city code display, city name display, daylight saving on/off, and automatic daylight saving time (DST) switching. Stopwatch. 1/100-second stopwatch. Measuring capacity: 00´00´´00-59´59´´99 (for the first 60 minutes) and 1:00´00-23:59´59 (after 60 minutes). Measuring unit: 1/100 s. (for the first 60 minutes) and 1 s. (after 60 minutes). Measuring modes: elapsed time, split time, and first- and second-place time. Timer. Countdown timer. Measuring unit: 1 second. Countdown range: 24 hours. Countdown start time setting range: 1 second to 24 hours (1-second, 1-minute, and 1-hour increments). Alarm/Hourly Time Signal. 5 daily alarms. Hourly Time Signal. Illumination. Double LED light, LED light for dial [super illuminator, selectable illumination duration (1.5 or 3 seconds) and luminosity], LED light for digital display [super illuminator, selectable illumination duration (1.5 or 3 seconds) and luminosity]. Light color. LED: white. Calendar. Full auto-calendar (to year 2099). Mute function. Button press tone on/off. Accuracy. Accuracy: ±15 seconds per month. Other options. 12- and 24-hour format. Hand shift function (hands move to provide a clear view of the digital display contents.). Normal timekeeping. Analog: 2 hands (hour and minute (hand moves every 20 seconds) / Digital: hour, minute, second, p.m., month, date and day. Dimensions (L × W × H). 46 × 42 × 13 mm. Weight. 55 g. Case and bezel material. Resin / Stainless Steel. Strap. Resin strap. Assembly. Shock resistant. Water resistance. Water resistant up to 20 bar. Power supply and battery life. Approximate battery life: 3 years with CR1025.