From G-SHOCK, the watch brand that is constantly setting new standards for timekeeping toughness, come new models based on the big case Tough Solar GAS-100.
Variations on a basic black design are created by three different bezels. The GAS-100 comes with a stainless steel bezel for a standard design that goes well with a wide range of fashion styles, while the GAS-100G has a stainless steel bezel with a gold ion-plated finish for touch of distinctive beauty. The GAS-100B has a black aluminum bezel for a cool design.

SPECIFICATIONS

Brand: Casio
SKU: GAS100B-1A2
Size: 55.1×52.5×16.7mm
Case: Resin
Colour: Black, Blue
Dial Colour: Positive
Strap Material: Resin
Movement: Japanese
Crystal: Mineral
Watch Features: 

• Shock resistant
• 200m water resistance
• Solar powered
• Double LED light
• LED light for the face (Full auto LED light, Super illuminator, selectable
• illumination duration, afterglow)
• LED backlight for the digital display (Full auto LED light, Super illuminator,
• selectable illumination duration, afterglow)
• 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, date, day
• Accuracy: ±15 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)
• Module: 5445