G Shock GD100-1B

Based on the widely successful analog/digital GA100 X-Large G Series, G-Shock an all digital version large size and wide face not only give a look of power and strength, but make it extremely easy-to-read and use with its oversized buttons. For added visibilty in dark conditions, a newly designed high-density LED light has been employed to light up the dial face from behind. The result is a luminous display that's a true reflection of G-Shock's desire to continually improve timekeeping.

• 200M Water Resistant
• Shock Resistant
• Auto LED Backlight (Super Illuminator)
• Multi-time (4 different cities)
• World Time
  31 time zones (48 cities + UTC), city code display, daylight saving on/off
• 5 Independent Alarms (one-time or daily)
• Hourly Time Signal
• Flash alert 
  Flasher with buzzer that sounds for alarms, hourly time signal, countdown timer time-up alarm, countdown timer progress beeper
• 1/100 second stopwatch
  Measuring capacity: 23:59’59.99” 
  Measuring modes: Elapsed time, split time, 1st-2nd place times
• Countdown timer 
  Measuring unit: 1/10 second 
  Countdown range: 24 hours 
  Countdown start time setting range: 1 minute to 24 hours (1-second increments, 1-minute increments and 1-hour increments) 
  Other: progress beeper
• Full Auto Calendar (pre-programmed until the year 2099)
• 12/24 Hour Formats
• Button operation tone on/off
• Accuracy: +/-15 seconds per month
• Battery: CR2025
• Approx. battery life: 7 years
• Module 3263

Size of case/total weight 
GD100 55.0 x 51.2 x 17.4mm / 72g