G-Shock GA2100WD-1A Watch. Go bold and confident with a strikingly straightforward G-SHOCK in high-contrast black and white. Beginning with a base of G-SHOCK jet black and then bring in a bright dial finished in brilliant white vapor deposition. The monochromatic statement is a study in contrasts—matte black against glossy white. Carbon case. Bio-based resin bezel and band. Shock resistant. Carbon Core guard structure. 200-meter water resistance. Approximate battery life: 3 years on SR726W x 2. World time (31 time zones). 1/100-second stopwatch. Countdown timer (measuring unit 1 second). 5 daily alarms. Hourly time signal. Double LED light. LED: white. Full auto-calendar to year 2099. Button operation tone on/off mute feature. Accuracy: +/- 15 seconds per month. 12/24-hour format. Imported.