G-Shock GA-211OSU-3AER  Introducing new Utility Color additions to GA-2100 thin, analog-digital combination line up from G-SHOCK, the watch brand that is constantly setting new standards for unmatched timekeeping toughness. These new models combine practical and utilitarian colors Features include: Shock Resistant Carbon Core Guard structure Mineral Glass Neobrite 200-meter water resistance Case / bezel material: Carbon / Resin　 Resin Band 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) Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents) World time 31 time zones (48 cities + coordinated universal time), daylight saving on/off 1/100-second stopwatch Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes) 1:00'00''~23:59'59'' (after 60 minutes) Measuring unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments) 5 daily alarms Hourly time signal Hand shift feature Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day) Digital: Hour, minute, second, pm, month, date Accuracy: ±15 seconds per month Approx. battery life: 3 years on SR726W × 2 LED:White This watch comes with a G-Shock authenticity certificate.