A favorite for decades - the slim, lightweight F-91 with digital LCD now with a minimalist face, fewer mode indicators, and more environmentally responsible materials. The band is made with bio-based resin, a material expected to help reduce environmental impact. Complete with date/day display, alarm, stopwatch and other handy functions, these watches are always at the ready. Case / bezel material: ResinBio-based resin bandResin GlassWater ResistantLED lightLED:Green1/100-second stopwatchMeasuring capacity: 59'59.99''Measuring modes: Elapsed time, split time, 1st-2nd place timesDaily alarmHourly time signalAuto-calendar (set at 28 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 : 38.2 x 35.2 x 8.5 mmTotal weight : 21 g