Casio General x Digital ft. Precision Tracking Men Casual Sports Round 100m Water Resistant Watch WS-2100H-1A WS2100H WS2100 WS-2100 WS-2100H Experience precision and durability with this digital watch, featuring a 3-year battery life, crystal resin glass, and LED light with selectable illumination duration. Water-resistant up to 100m, it also boasts a range of functional features, including dual time, stopwatch, countdown timer, and daily alarms. Battery Life / Accuracy Approximately 3 years (+/-30 seconds per month) Crystal Resin glass Light LED light (selectable illumination duration, afterglow) Case & Band Material Resin case with resin band Water Resistance 100m / 10 bar Case Size Thickness: 14.6 mm Diameter: 48.1 mm Length: 49.9 mm Other Specifications Casio General x Digital ft. Precision Tracking Dual time (home time swapping) 1/100-second stopwatch Countdown timer 5 daily alarms Hourly time signal Full auto-calendar (to year 2099) Button operation tone on/off 12/24-hour format Regular timekeeping (digital display)