Key Features Case / bezel material: Carbon / Resin Plastic strap Mineral glass surface Shock resistance Carbon core protective structure Water resistant to a depth of 200 meters Two LED lights LED light for watch face (Super illumination, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) Ultraviolet LED for digital display (Super illumination, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) World time 31 time zones (48 cities + coordinated universal time), daylight saving on/off 1/100 second stopwatch Measuring capacity:00'00”00~59'59”99 (for first 60 minutes)1:00'00”~23:59'59” (after 60 minutes) Measuring unit: 1/100 second (for first 60 minutes) 1 second (after 60 minutes) Measuring modes: Elapsed time, split time, 1st – 2nd finishing times Countdown Measurement 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) 5 daily alarms Hourly time signal Needle transfer feature Fully automatic calendar (to year 2099) 12/24 hour format Turn on/off button press sound Regular current time Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (date) Digital clock: Hour, minute, second, pm/pm, month, date Accuracy: ±15 seconds per month Approximate battery life: 3 years for SR726W × 2 batteries