G-Shock GA2100RL-1A A simple and streamlined watch with octagonal bezel. The original color scheme is faithfully reproduced with touches of G-SHOCK red, representing the passion to take on challenges; blue, symbolizing excellent water resistance; and yellow, signifying outstanding shock resistance. Basic Information Case size (L× W× H) 48.5 × 45.4 × 11.8 mm Weight 51 g Case and bezel material Carbon / Bio-based resin Band Bio-based resin band Construction Shock Resistant Carbon Core Guard structure Water resistance 200-meter water resistance Power supply and battery life Approx. battery life: 3 years on SR726W X 2 Exterior Glass Mineral Glass Compatible band size 145 to 215 mm Other Neobrite Watch Features World time World time 31 time zones (48 cities + coordinated universal time), daylight saving on/off Stopwatch 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 Timer 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) Alarm/hourly time signal 5 daily alarms Hourly time signal Light 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) Light color LED:White Calendar Full auto-calendar (to year 2099) Mute feature Button operation tone on/off Accuracy Accuracy: ±15 seconds per month Other features 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