Practical functionality and bold display meet in a sporty digital design. The W-218H is equipped with a 7-year battery, have 50-meter water resistance, and the LED light means you?ll always know what time it is, even in the dark. Case / bezel material: ResinResin BandResin Glass50-meter water resistanceLED backlightLED:Amber1/100-second stopwatchMeasuring capacity: 59'59.99"Measuring modes: Elapsed time, split time, 1st-2nd place timesDaily alarmHourly time signalAuto-calendar (29 days for February)12/24-hour formatRegular timekeeping:Hour, minute, second, pm, date, dayAccuracy: ±30 seconds per monthApprox. battery life: 7 years on CR2016Size of case : 44.4 x 43.2 x 10.8 mmTotal weight : 37 g