Casio General x Digital ft. World Map Men Casual Formal Round 100m Water Resistant Watch AE-1100WD-1A AE1100WD AE1100 AE-1100 AE-1100WD Experience precision and style with this innovative timepiece, featuring a remarkable 10-year battery life, LED backlight, and water resistance up to 100m. Stay connected with multi-time and world time functions, and enjoy a range of convenient features, including a stopwatch, countdown timer, and daily alarms. Battery Life / Accuracy Approximately 10 years (+/-30 seconds per month) Crystal Resin glass (curved) Light LED backlight (selectable illumination duration, afterglow) Case & Band Material Resin (chrome plated) case with metal band (three-fold clasp with push-button release) Water Resistance 100m / 10 bar Case Size Thickness: 13.7 mm Diameter: 43.7 mm Length: 48.1 mm Other Specifications Casio General x Digital ft. World Map Multi-time (4 different cities) World time (31 time zones) 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)