Casio G-Shock GA-2100 Lineup Urban Utility Series Carbon Core Guard Structure Bluetooth© Solar Powered Watch GAB2100LUU-5A GA-B2100LUU-5A

Sporty practicality with an urban street sensibility — check out the Urban Utility line of G-SHOCK in blue-gray and olive-green.
A practical G-SHOCK take on gorpcore fashion, combining functional outdoorsy touches and urban style, in characteristic designs and colors that integrate seamlessly into street fashion.
Based on the G-SHOCK 5600 and 2100 styles, with their iconic case designs, the line now comes in subtle colors for an even more stylish look.

Case / bezel material: Carbon / Bio-based resin
Bio-based 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 (with no mobile link function)
Approx. battery operating time:
7 months on rechargeable battery (operation period with normal use without exposure to light after charge)
18 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 × 45.4 × 11.9 mm
Total weight : 52 g