Case / bezel material: Carbon / Resin , Resin Band , Shock Resistant , Carbon Core Guard structure , 200-meter water resistance , Mineral Glass , Neobrite , World time 31 time zones (48 cities + coordinated universal time), daylight saving on/off . Stopwatch - 1/100-second stopwatch Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes) Measuring unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) Measuring modes: Elapsed time, split time, 1st-2nd place times . Timer - Countdown timer Measuring unit: 1 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) . Alarm/hourly time signal . 5 daily alarms . Hourly time signal . Light - Double LED light LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) . LED:White . Full auto-calendar (to year 2099) . Mute feature - Button operation tone on/off . Accuracy: ±15 seconds per month . 12/24-hour format . Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.) . Power supply and battery life- Approx. battery life: 3 years on SR726W X 2 . Regular timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day) Digital: Hour, minute, second, pm, month, date . Case size (L× W× H) - 48.5 × 45.4 × 11.8 mm . Weight - 51 g .