From G-Shock, the Men's 2100 Series Black & Gold Resin Strap Ana/Digi Watch features:  Shock-resistant Resin/stainless steel case/bezel Black resin band 200-meter water resistance Mineral glass Gold ion-plated bezel Neobrite World time 31 time zones (48 cities + coordinated universal time), daylight saving on/off Countdown timer 1/100-second stopwatch 5 daily alarms Hourly time signal Double LED light LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) Full auto-calendar (to year 2099) Button operation tone on/off 12/24-hour format Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.) Regular timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day); Digital: Hour, minute, second, pm, month, date Button operation tone on/off Case size approx. 45.9mm x 40.4mm x 11mm Battery life approx. 3 years on CR1025 Imported.