gma-s2100ba-2a1er G-shock Blue

International Time
World Time 31 time zones (48 cities + Coordinated Universal Time), Daylight Saving Time on/off
Stopwatch
Hundredths of a second stopwatch Measuring range: 00'00''00~59'59''99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes) Measuring unit: 1 hundredth of a second (for the first 60 minutes) 1 second (after 60 minutes) Measuring modes: Elapsed time, split time, 1st and 2nd place times
Timer
Countdown Timer Unit of measurement: 1 second Countdown interval: 24 hours Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments, and 1-hour increments)
Sound reminder / Time signal
5 daily sound reminders
Time signal
Light
Dual LED light for dial (Super Illuminator, selectable illumination duration (1.5 seconds or 3 seconds), luminescence) LED backlight for digital display (Super Illuminator, selectable illumination duration (1.5 seconds or 3 seconds), luminescence)
Light color
LED: White
Calendar
Full automatic calendar (up to the year 2099)
Volume mute
Activation/deactivation of the button press acoustic signal
Precision
Accuracy: ±15 seconds per month
Other features
12/24 hour format
Hand movement function (the hands move so as not to block the view of the digital display contents).
Regular timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day of the month) Digital: hour, minute, second, pm, month, date

Glass
Mineral glass
Adjustable strap
From 140 to 205 mm
Various
Neobrite

Case dimensions (H x W x D)
46.2 × 42.9 × 11.2 mm
Weight
41 g
Strap
Resin strap
Structure
Shock resistant
Carbon Core Guard Structure
Waterproof
Water resistant up to 200 meters
Power and battery life
Approximate battery life: 3 years with SR726W X 2