From G-SHOCK, the watch brand that is constantly setting new standards for timekeeping toughness, come new basic color models using on big case, Tough Solar GAS-100 as the base.
A large, rugged case combines with an aluminum bezel and basic coloring. The bezel of the GAS-100B-1A2DR is a popular blue hue that adds a sporty accent to the overall design.
Tough Solar
Hand shift feature
Double LED Light (Super Illuminator with Full Auto Light)

• Case / bezel material: Resin / Aluminum
• Resin Band
• Mineral Glass
• Shock Resistant
• 200-meter water resistance
• Double LED light
• LED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
• LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
• Solar powered
• World time
• 31 time zones (48 cities + coordinated universal time), daylight saving on/off
• 1/100-second stopwatch
• Measuring capacity: 59'59.99''
• Measuring modes: Elapsed time, split time, 1st-2nd place times
• Countdown timer
• Measuring unit: 1 second
• Countdown range: 100 minutes
• Countdown start time setting range: 1 second to 100 minutes (1-second increments, 1-minute increments)
• 5 daily alarms
• Hourly time signal
• Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
• 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
• Regular timekeeping
• Analog: 2 hands (hour, minute)
• Digital: Hour, minute, second, pm, month, date, day
• Accuracy: ’???Ç??Ç?Çï’???’??Ǩ’???’???’???Ç?ǨÇ?Çï’???¶ôÇ÷¶ô¶¦¶ôÇû¶ô¶¦¶ô¶¸¶ô¶¦¶ôÇû¶ô¶¦¶ôÇñ15 seconds per month
• Approx. battery operating time:
• 8 months on rechargeable battery (operation period with normal use without exposure to light after charge)
• 19 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
• Size of case : 55.1’???Ç??Ç?Çï’???’??Ǩ’???’???’???Ç?ǨÇ?Çï’???¶ô¶«’???Ç??Ç?Çï’???Ç??’???’???’???Ç?ǨÇ?Çï’???€©’???Ç?ǨÇ?Çï’???Ç??52.5’???Ç??Ç?Çï’???’??Ǩ’???’???’???Ç?ǨÇ?Çï’???¶ô¶«’???Ç??Ç?Çï’???Ç??’???’???’???Ç?ǨÇ?Çï’???€©’???Ç?ǨÇ?Çï’???Ç??16.7mm
• Total weight : 72g