Upgrade the retro look you love with the octagonal GA-2100 line, which inherits the design concept of the very first G-SHOCK, but now with Smartphone Link and Tough Solar power.

• Case / bezel material: Resin
• Resin Band
• Mineral Glass
• Neobrite
• Shock Resistant
• Carbon Core Guard structure
• 200-meter water resistance
• Tough Solar (Solar powered)
• 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)
  LED:White
• Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
• Mobile link (Wireless linking using Bluetooth®)
• World time, 38 time zones (38 cities + coordinated universal time), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
• 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, lap/split time
• Countdown timer
  Measuring unit: 1 second
  Countdown range: 60 minutes
  Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)
• 5 daily alarms
• Hourly time signal
• Battery level indicator
• Power Saving (display goes blank to save power when the watch is left in the dark)
• Full auto-calendar (to year 2099)
• 12/24-hour format
• Button operation tone on/off
• Date/month display swapping
• Day display (days of the week selectable in six languages)
• Regular timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode), Digital: Hour, minute, second, pm, month, date, day
• Accuracy: +/-15 seconds per month
• Approx. battery operating time:
• 11 months on rechargeable battery (operation period with normal use without exposure to light after charge), 27 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
• Size of case : 48.5 x 45.4 x 11.9mm
• Total weight : 52g