Being square never looked so good. These timepieces, inspired by the classic design of the DW-5600 from G-SHOCK actually have an octagonal case shape and button guards that prevent accidental operation. A large case, and a 7-year battery make for stylish and reliable timepiece. FEATURES Case size (L× W× H): 44.4 × 42.6 × 10.3 mm Weight: 31 g Case and bezel material: Resin Band: Resin Band Water Resistant Power supply and battery life: Approx. battery life: 7 years on CR2016 Glass: Resin Glass Stopwatch1/100-second stopwatchMeasuring capacity: 59'59.99"Measuring modes: Elapsed time, split time, 1st-2nd place times Alarm/hourly time signalDaily alarmHourly time signal LightLED backlight Light colorLED:Amber CalendarAuto-calendar (set at 28 days for February) AccuracyAccuracy: ±30 seconds per month Other features12/24-hour formatRegular timekeeping:Hour, minute, second, pm, date, day