W215H-1A Case size: 43.8 × 40.7 × 10.9mm Case / Band Material: Resin Water resistant up to 50 m LED backlight background 1/100 second stopwatches Measuring capacity: 59'59.99 " Measuring modes: Elapsed time, split time, 1st and 2nd place times Daily alarm Hourly signaling Automatic calendar (February with 29 days) Formats 12/24 hours Regular time: hour, minute, second, pm (post meridian), date, day Accuracy: ± 30 seconds per month Battery life: 7 years with CR2016