G-Shock Watch: Gmb-2100A-1Aer

Case
Dimensions (LxWxH): 49.3 × 44.4 × 11.9 mm
Material: Stainless steel/Bio-based resin
Water resistance: 20 bar

Watch function
World time: 31 time zones (48 cities + coordinated universal time), daylight saving on/off
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, split time, 1st-2nd place times

Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments, and 1-hour increments)

5 daily alarms
Hourly time signal

Double LED light
LED light for the face (Super Illuminator, selectable illumination duration (1.5 or 3 seconds), afterglow)
LED backlight for the digital display (Super Illuminator, selectable illumination duration (1.5 or 3 seconds), afterglow)
LED: White

Full auto-calendar (to year 2099)
Button operation tone on/off
Accuracy: ±15 seconds per month
12/24-hour format
Hand shift feature (hands move out of the way to provide an unobstructed view of digital display contents.)
Regular timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day) Digital: Hour, minute, second, pm, month, date

Reference: GM-2100BB-1AER

Warranty: 2 years