GM-2100G-1A9ER Watch

The Watch

Your Casio G-Shock watch is built to take on any adventure, thanks to its rugged glass-fiber reinforced resin case combined with stainless steel. The case measures 44.5 × 49.3 mm with a thickness of 11.8 mm. The case features an ion-plated finish in yellow. At just 72 grams, you'll barely feel it on your wrist! A yellow octagonal bezel frames the case. Use the 4 pushers on either side of the case to access the functions displayed on your dial. A mineral crystal protects the watch from wear and damage, while the screw-back case ensures water resistance up to 20 ATM.

The Dial

Against your black dial, you can easily spot the two large central yellow hands with Neobrite coating, giving you a clear read of hours and minutes at all times. Follow the minutes along the 12 black baton indexes and the double-circle finish housing your minute track. Your dial is packed with features: LED illumination, world time function, 1/100-second 24-hour stopwatch, 1-second 24-hour countdown timers, and 5 daily alarms - all at your fingertips. A 12/24-hour time format is also available. A subdial at 9 o'clock lets you navigate between functions, while a digital display sits between 3 and 6 o'clock.

Functions

LED Illumination
The watch dial is illuminated by a light-emitting diode.

Shock Resistance
The shock-resistant structure protects the watch against impacts and vibrations.

Neobrite Coating
The hands and/or indexes feature a fluorescent coating that keeps glowing in the dark after the watch has been exposed to a light source.

World Time Function
The world time function displays the time in 29 time zones and major cities around the world.

1/100-Second Stopwatch - 24 Hours
Measures elapsed time with 1/100-second precision for a maximum duration of 24 hours. An audible signal confirms the start and stop of the stopwatch.

Countdown Timers - 1-Second Intervals - 24 Hours
For precision lovers: countdown timers alert you to important or recurring events with an audible signal at the set date and time. Time can be set in seconds, up to 24 hours in advance.

5 Daily Alarms
An audible alarm reminds you of your commitments every day at the programmed time. This model features five independent alarms for maximum flexibility in managing your important appointments.

Hand Shift Function
This function moves the hands out of the way when they obstruct the time, date, or stopwatch display.

Button Beep On/Off
The button beep can be turned off using the mode button. Once disabled, no beep sounds when switching between functions. However, any programmed alarms or countdown timers remain active even after the button beep is turned off.

Auto Calendar
Once set, the auto calendar always displays the correct date.

12/24-Hour Time Format
You can display the time in either 12-hour or 24-hour format.

Mineral Crystal
The hard, scratch-resistant mineral crystal protects the watch from unsightly damage.

Resin Strap
With its exceptional durability and flexibility, synthetic resin is an ideal material for watch straps.

Buckle
The strap is fitted with a pin buckle.

3 Years - 1 Battery
The battery powers the watch for approximately 3 years.

Water Resistance Class (20 Bar)
Perfect for swimming and free diving: the watch is water-resistant up to 20 bar (ISO 22810).

The Movement

Your quartz movement runs on a battery with an approximate lifespan of 3 years - plenty of time to enjoy your watch and its reliability.

The Bracelet

A resin strap has been chosen to complement your watch. This durable material is ready to keep up with all your activities! A yellow pin buckle lets you adjust the strap to your perfect fit.

Water Resistance

This model delivers water resistance up to 20 atmospheres, or 200 meters. This is a watch that can truly keep up with your deep-water aquatic activities - built for free diving! And since water holds no fear for it, you can even use high-pressure washers with this timepiece on your wrist. Shower, bath, lap swimming, and free diving are all fair game. That said, if you're planning a scuba dive, we recommend a timepiece with a higher water resistance rating. Also be sure not to operate the crown or pushers while the watch is submerged, to protect the integrity of the movement.