Casio G-Shock x GD-B500 Series ft. Compact Future Men Casual Sports Hexagon 200m Water Resistant Watch GD-B500-1D GDB500 GD-B500 Experience a fusion of form and function with a compact digital watch that redefines urban style. Slimmed down for modern living, this rugged timepiece packs a punch with its futuristic design and essential features, perfect for those who demand more from their accessory. Battery Life / Accuracy Approximately 2 years (+/-15 seconds per month) Crystal Mineral crystal Light LED backlight (super illuminator, auto light switch, selectable illumination duration, afterglow) Case & Band Material Resin case with resin band Water Resistance 200m / 20 bar Case Size Thickness: 11.0 mm Diameter: 41.5 mm Length: 46.3 mm Other Specifications Casio G-Shock x GD-B500 Series ft. Compact Future Shock resistant Mobile link (wireless linking via Bluetooth®) Dual time (home time swapping) 1/100-second stopwatch (elapsed time, lap time, split time, up to 200 recorded data) Countdown timer (60 minutes) 5 daily alarms Hourly time signal Full auto-calendar (to year 2099) Button operation tone on/off Power saving on/off Low battery alert 12/24-hour format Regular timekeeping (digital display)