Casio General x Ana-Digi ft. Tough Solar Men Casual Round 100m Water Resistant Watch AQ-S810W-1A AQS810W AQS810 AQ-S810 AQ-S810W Experience the ultimate in rugged reliability with a watch that boasts 10 months of battery life on a single charge, advanced features like world time, stopwatch, and countdown timers, and a durable design that can withstand the toughest conditions, all while maintaining a sleek and stylish aesthetic. Module / Movement 5208 (solar powered) Power Reserve / Accuracy Approximately 10 months without exposure to light (+/-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: 13.8 mm Diameter: 46.6 mm Length: 52.2 mm Other Specifications Casio General x Ana-Digi ft. Tough Solar World time (31 time zones, daylight saving on/off, home/world time city swapping) 1/100-second stopwatch (up to 60 minutes, elapsed time, split time) 2 1-second countdown timers (up to 100 minutes, repeatable 1 to 10 times) 5 daily alarms Hourly time signal Full auto-calendar (to year 2099) Button operation tone on/off Power saving (display goes blank to save power when left in the dark) Battery power indicator 12/24-hour format Regular timekeeping (analog-digital display)