G-Shock GA100TU-1A3 Watch. Utilitarian practicality, savvy style — all with G-SHOCK functionality and toughness. Pairing a black watch face with a band in beige or olive green, the two-tone utility color line evokes the functional look of a great piece of gear. Resin case, bezel and band. Shock resistant. Magnetic resistant. 200-meter water resistance. Approximate battery life: 2 years on CR1220. World time (29 time zones). 1/1000-second stopwatch. Countdown timer. 5 daily alarms with 1 snooze alarm. Hourly time signal. LED light. LED: Amber. Full auto-calendar to year 2099. Accuracy: +/- 15 seconds per month. 12/24-hour format. Imported.